Make IRC_WHO also search username/servername/hostname.

Dana Dahlstrom reported that IRC_WHO did not follow
RFC 2812, Section 3.6.1. Specifically:

- IRC_WHO did not send "G" flag instead if "H" if client was away
- did not search username/servername/hostname etc. if argument
  was not a channel.

Fix all of the above and tidy things up a bit.
Also add IRC_WHO test script contributed by Dana.

ChangeLog

@@ -11,7 +11,10 @@
 
 
 ngIRCd HEAD
-
+  - IRC_WHO now supports search patterns and will test this
+    against user nickname/servername/hostname, etc. as required by
+    RFC 2812, Section 3.6.1. (reported by Dana Dahlstrom)
+  - Add test cases for "WHO" command. (Dana Dahlstrom)
   - implement RFC 2812 handling of "0" argument to 'JOIN':
     must be treated as if the user had sent PART commands
     for all channels the user is a member of. (Dana Dahlstrom)
@@ -741,4 +744,4 @@ ngIRCd 0.0.1, 31.12.2001
 
 
 -- 
-$Id: ChangeLog,v 1.336 2008/02/05 13:31:50 fw Exp $
+$Id: ChangeLog,v 1.337 2008/02/11 11:06:33 fw Exp $