Consistently name every hookset with prefix `hooks_`. NFC.

I'm sure this causes massive merge-conflicts in the non-public code,
but I think it'd be a good idea, if only to avoid confusion between
e.g. `clearMemory` and the-variable-formerly-known-as `clearmemory`.

blizzard.cpp

@@ -251,7 +251,7 @@ EX void drawArrowTraps() {
     }
   }
 
-auto ccm_blizzard = addHook(clearmemory, 0, [] () {
+auto ccm_blizzard = addHook(hooks_clearmemory, 0, [] () {
   arrowtraps.clear();
   blizzardcells.clear();
   bcells.clear();

cell.cpp

@@ -1175,7 +1175,7 @@ EX void clearCellMemory() {
   gp::gp_adj.clear();
   }
 
-auto cellhooks = addHook(clearmemory, 500, clearCellMemory);
+auto cellhooks = addHook(hooks_clearmemory, 500, clearCellMemory);
 
 EX bool isNeighbor(cell *c1, cell *c2) {
   for(int i=0; i<c1->type; i++) if(c1->move(i) == c2) return true;

complex.cpp

@@ -3418,7 +3418,7 @@ EX namespace ca {
     }
 EX }
 
-auto ccm = addHook(clearmemory, 0, [] () {
+auto ccm = addHook(hooks_clearmemory, 0, [] () {
   heat::offscreen_heat.clear();
   heat::offscreen_fire.clear();
   princess::clear();

complex2.cpp

@@ -198,7 +198,7 @@ EX namespace brownian {
     vector<cell*> to_remove;
     for(auto p: futures) if(is_cell_removed(p.first)) to_remove.push_back(p.first);
     for(auto r: to_remove) futures.erase(r);
-    }) + addHook(clearmemory, 0, [] () { futures.clear(); })
+    }) + addHook(hooks_clearmemory, 0, [] () { futures.clear(); })
     + addHook(hooks_gamedata, 0, [] (gamedata* gd) { gd->store(futures); });
 
 EX }

drawing.cpp

@@ -1846,7 +1846,7 @@ ld xintval(const hyperpoint& h) {
 
 EX ld backbrightness = .25;
 
-purehookset hook_drawqueue;
+purehookset hooks_drawqueue;
 
 constexpr int PMAX = int(PPR::MAX);
 int qp[PMAX], qp0[PMAX];
@@ -2032,7 +2032,7 @@ EX hookset<bool()> *hooks_vr_draw_all;
 #endif
   
 EX void drawqueue() {
-  callhooks(hook_drawqueue);
+  callhooks(hooks_drawqueue);
   current_display->next_shader_flags = 0;
   reset_projection();
   // reset_projection() is not sufficient here, because we need to know shaderside_projection

fieldpattern.cpp

@@ -1295,8 +1295,8 @@ discovery::~discovery() { schedule_destruction(); if(discoverer) discoverer->joi
 
 int hk = 
 #if CAP_THREAD
-  + addHook(on_geometry_change, 100, [] { for(auto& d:discoveries) if(!d.second.is_suspended) d.second.suspend(); })
-  + addHook(final_cleanup, 100, [] { 
+  + addHook(hooks_on_geometry_change, 100, [] { for(auto& d:discoveries) if(!d.second.is_suspended) d.second.suspend(); })
+  + addHook(hooks_final_cleanup, 100, [] { 
       for(auto& d:discoveries) { d.second.schedule_destruction(); if(d.second.is_suspended) d.second.activate(); }
       discoveries.clear();
       })
@@ -1314,7 +1314,7 @@ int hk =
 #endif
   + 0;
 
-EX purehookset on_geometry_change;
+EX purehookset hooks_on_geometry_change;
 
 EX int field_celldistance(cell *c1, cell *c2) {
   if(geometry != gFieldQuotient) return DISTANCE_UNKNOWN;

graph.cpp

@@ -5150,7 +5150,7 @@ EX void clearAnimations() {
   fallanims.clear();
   }
   
-auto graphcm = addHook(clearmemory, 0, [] () {
+auto graphcm = addHook(hooks_clearmemory, 0, [] () {
   DEBBI(DF_MEMORY, ("clear graph memory"));
   mouseover = centerover = lmouseover = NULL;  
   gmatrix.clear(); gmatrix0.clear(); current_display->all_drawn_copies.clear();

history.cpp

@@ -689,7 +689,7 @@ EX namespace history {
   auto hookArg = addHook(hooks_args, 100, readArgs);
   #endif  
 
-  auto hooks = addHook(clearmemory, 0, [] () {
+  auto hooks = addHook(hooks_clearmemory, 0, [] () {
     history::renderAutoband();
     history::on = false;
     history::killhistory.clear();

mapeditor.cpp

@@ -2128,7 +2128,7 @@ namespace mapeditor {
     }
 #endif    
 
-  auto hooks = addHook(clearmemory, 0, [] () {
+  auto hooks = addHook(hooks_clearmemory, 0, [] () {
     if(mapeditor::painttype == 4) 
       mapeditor::painttype = 0, mapeditor::paintwhat = 0,
       mapeditor::paintwhat_str = "clear monster";

pattern2.cpp

@@ -3013,7 +3013,7 @@ int read_pattern_args() {
   return 0;
   }
 
-auto ah_pattern = addHook(hooks_args, 0, read_pattern_args) + addHook(clearmemory, 100, [] { patterns::computed_nearer_map.clear(); patterns::computed_furthest_map.clear(); });
+auto ah_pattern = addHook(hooks_args, 0, read_pattern_args) + addHook(hooks_clearmemory, 100, [] { patterns::computed_nearer_map.clear(); patterns::computed_furthest_map.clear(); });
 #endif
 
 }

racing.cpp

@@ -835,7 +835,7 @@ heptspin sview;
 #if CAP_COMMANDLINE
 auto hook = 
   addHook(hooks_args, 100, readArgs)
-+ addHook(clearmemory, 0, []() {
++ addHook(hooks_clearmemory, 0, []() {
     track_ready = false;
     track.clear();
     rti.clear();

rogueviz/pentagonal.cpp

@@ -346,7 +346,7 @@ bool handleKey(int sym, int uni) {
 auto xhook = addHook(hooks_args, 100, readArgs)
 + addHook(hooks_handleKey, 0, handleKey)
 + addHook(hooks_prestats, 0, frame)
-+ addHook(clearmemory, 40, [] () { snubon = false; } )
++ addHook(hooks_clearmemory, 40, [] () { snubon = false; } )
 + addHook(rvtour::hooks_build_rvtour, 142, [] (vector<tour::slide>& v) {
     using namespace tour;
     v.push_back(

rogueviz/rogueviz.cpp

@@ -1232,7 +1232,7 @@ auto hooks  =
 #if CAP_COMMANDLINE
   addHook(hooks_args, 100, readArgs) +
 #endif
-  addHook(clearmemory, 0, close) +
+  addHook(hooks_clearmemory, 0, close) +
   addHook(hooks_prestats, 100, rogueviz_hud) +
   addHook(shmup::hooks_draw, 100, drawVertex) +
   addHook(shmup::hooks_describe, 100, describe_monster) +
@@ -1240,7 +1240,7 @@ auto hooks  =
   addHook(hooks_o_key, 100, o_key) +
   
 #if CAP_RVSLIDES
-  addHook(tour::ss::extra_slideshows, 100, [] (bool view) {
+  addHook(tour::ss::hooks_extra_slideshows, 100, [] (bool view) {
     if(!view) return 1;
     dialog::addBoolItem(XLAT("RogueViz Tour"), tour::ss::wts == &rvtour::rvslides[0], 'r');
     dialog::add_action([] { tour::ss::wts = rvtour::gen_rvtour(); popScreen(); });    

rogueviz/snow.cpp

@@ -199,7 +199,7 @@ named_functionality o_key() {
 
 auto hchook = addHook(hooks_drawcell, 100, draw_snow)
 
-+ addHook(clearmemory, 40, [] () {
++ addHook(hooks_clearmemory, 40, [] () {
     matrices_at.clear();
     })
 

shmup.cpp

@@ -2844,7 +2844,7 @@ EX void addShmupHelp(string& out) {
     }
   }
 
-auto hooks = addHook(clearmemory, 0, shmup::clearMemory) +
+auto hooks = addHook(hooks_clearmemory, 0, shmup::clearMemory) +
   addHook(hooks_gamedata, 0, shmup::gamedata) +
   addHook(hooks_removecells, 0, [] () {
     for(mit it = monstersAt.begin(); it != monstersAt.end();) {

system.cpp

@@ -1246,11 +1246,11 @@ eModel default_model() {
   return mdDisk;
   }
 
-EX purehookset on_geometry_change;
+EX purehookset hooks_on_geometry_change;
 
 EX void set_geometry(eGeometry target) {
   bool was_default = pmodel == default_model();
-  callhooks(on_geometry_change);
+  callhooks(hooks_on_geometry_change);
   if(geometry != target) {
     int old_DIM = GDIM;
     stop_game();
@@ -1497,10 +1497,10 @@ EX void stop_game_and_switch_mode(char switchWhat IS(rg::nothing)) {
   switch_game_mode(switchWhat);
   }
 
-EX purehookset clearmemory;
+EX purehookset hooks_clearmemory;
 
 EX void clearMemory() {
-  callhooks(clearmemory);
+  callhooks(hooks_clearmemory);
   }
 
 EX bool fixseed = false;
@@ -1544,7 +1544,7 @@ EX void initAll() {
   polygonal::solve();
   }
 
-EX purehookset final_cleanup;
+EX purehookset hooks_final_cleanup;
 
 EX void finishAll() {
   achievement_final(!items[itOrbSafety]);
@@ -1558,11 +1558,11 @@ EX void finishAll() {
 #endif
   
   achievement_close();  
-  callhooks(final_cleanup);
+  callhooks(hooks_final_cleanup);
   }
 
 
-auto cgm = addHook(clearmemory, 40, [] () {
+auto cgm = addHook(hooks_clearmemory, 40, [] () {
   pathq.clear();
   dcal.clear();
   clearshadow();

textures.cpp

@@ -1725,7 +1725,7 @@ int textureArgs() {
 
 auto texture_hook = 
   addHook(hooks_args, 100, textureArgs)
-+ addHook(clearmemory, 100, [] () { config.data.pixels_to_draw.clear(); });
++ addHook(hooks_clearmemory, 100, [] () { config.data.pixels_to_draw.clear(); });
 
 int lastupdate;
 

tour.cpp

@@ -377,13 +377,13 @@ EX namespace ss {
 
   string slidechars = "abcdefghijklmnopqrsvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ23456789!@#$%^&*(";
   
-  EX hookset<int(bool)> *extra_slideshows;
+  EX hookset<int(bool)> *hooks_extra_slideshows;
 
   EX void slideshow_menu() {
     dialog::init(XLAT("slideshows"), forecolor, 150, 100);
     dialog::addBoolItem(XLAT("Guided Tour"), wts == default_slides, 't');
     dialog::add_action([] { wts = default_slides; popScreen(); });
-    callhooks(extra_slideshows, true);
+    callhooks(hooks_extra_slideshows, true);
     dialog::addBack();
     dialog::display();
     }
@@ -438,7 +438,7 @@ EX namespace ss {
       }
     dialog::addBreak(50);
     bool b = false;
-    if(callhandlers(0, extra_slideshows, b)) {
+    if(callhandlers(0, hooks_extra_slideshows, b)) {
       dialog::addItem(XLAT("change slideshow"), '1');
       dialog::add_action_push(slideshow_menu);
       }

wfcgen.cpp

@@ -288,7 +288,7 @@ auto wfc_hook =
     });
 #endif
 
-auto cgm = addHook(clearmemory, 40, [] () { centers.clear(); }) +  addHook(hooks_removecells, 0, [] () { eliminate_if(centers, is_cell_removed); });
+auto cgm = addHook(hooks_clearmemory, 40, [] () { centers.clear(); }) +  addHook(hooks_removecells, 0, [] () { eliminate_if(centers, is_cell_removed); });
 
 EX }
 

yendor.cpp

@@ -799,7 +799,7 @@ EX namespace yendor {
     achievement_victory(false);
     }
   
-  auto hooks = addHook(clearmemory, 0, [] () {
+  auto hooks = addHook(hooks_clearmemory, 0, [] () {
     yendor::yii = NOYENDOR; yendor::yi.clear();
     }) + addHook(hooks_removecells, 0, [] () {
     eliminate_if(yendor::yi, [] (yendorinfo& i) {