Documentation: Spelling fixes

doc/Commands.txt

@@ -380,7 +380,7 @@ Status and Informational Commands
 
 	Please note that "all" IRC daemons even parse separate nicknames in
 	a single parameter (like ":nick1 nick2"), and therefore ngIRCd
-	implements this behaviour, too.
+	implements this behavior, too.
 
 	References:
 	 - RFC 2812, 4.9 "Ison message"

doc/Contributing.txt

@@ -15,7 +15,7 @@ get an idea of how to do it the best :-)
  - Use GIT
 
    The source code of ngIRCd is maintained using GIT, see doc/GIT.txt. So if
-   remotely possible, use GIT for your work, too. It makes your and our lifes
+   remotely possible, use GIT for your work, too. It makes your and our lives
    much easier ;-)
 
  - Don't forget to include documentation

doc/FAQ.txt

@@ -99,7 +99,7 @@ IV. Bugs!?
 ~~~~~~~~~~
 
 Q: Is there a list of known bugs and desired feature enhancements?
-A: Yes. Have a look at the bug tracking system (Github issues) for ngIRCd located
+A: Yes. Have a look at the bug tracking system (GitHub issues) for ngIRCd located
    at <https://github.com/ngircd/ngircd/issues>. There you can file bug
    reports and feature requests as well as search the bug database.
 

doc/Modes.txt

@@ -88,4 +88,4 @@ Notes
 ~~~~~
 
 (1) This mode is not set by ngIRCd itself but by services. ngIRCd handles
-    the mode transparently and possibly adjusts its behaviour.
+    the mode transparently and possibly adjusts its behavior.