Add /on NOTICE_GROUP and /fset NOTICE_GROUP analogous to MSG_GROUP

This hook and format are used for NOTICEs where the destination isn't
a channel and isn't yourself - eg. global targets like $$*.org.  This was
already the case for PRIVMSGs (using the MSG_GROUP hook and format).

Previously these were being routed like a normal NOTICE, and those don't
display the target, so it looked exactly like a private NOTICE to you.

This will also catch server notices sent before you're registered.

include/color.h

@@ -139,7 +139,8 @@
 #define DEFAULT_FORMAT_IGNORE_NOTICE_FSET "%K-%P$2%K(%p$3%K)-%n $4-"
 #define DEFAULT_FORMAT_IGNORE_WALL_FSET "%K%P$1%n $2-"
 /* Done MSG */
-#define DEFAULT_FORMAT_MSG_GROUP_FSET "%K-%P$1%K:%p$3%K-%n $4-"
+#define DEFAULT_FORMAT_MSG_GROUP_FSET "%K-%P$1%K:%p$2%K-%n $3-"
+#define DEFAULT_FORMAT_NOTICE_GROUP_FSET "%K=%P$1%K:%p$2%K=%n $3-"
 
 /* Done NAMES */
 #define DEFAULT_FORMAT_NAMES_BANNER_FSET "$G "
@@ -570,6 +571,7 @@
 #define DEFAULT_FORMAT_IGNORE_NOTICE_FSET "%K-%P$2%K(%p$3%K)-%n $4-"
 #define DEFAULT_FORMAT_IGNORE_WALL_FSET "%K%P$1%n $2-"
 #define DEFAULT_FORMAT_MSG_GROUP_FSET "%K-%P$1%K:%p$2%K-%n $3-"
+#define DEFAULT_FORMAT_NOTICE_GROUP_FSET "%K=%P$1%K:%p$2%K=%n $3-"
 
 #define DEFAULT_FORMAT_NAMES_FSET ansi?"$G %K[%GUsers%K(%g$1%K:%g$2%K/%g$3%K)]%c $4":"$G [Users($1:$2/$3)] $4"
 #define DEFAULT_FORMAT_NAMES_BOT_FSET ansi?"$G %K[%GBots%K(%g$1%K:%g$2%K/%g$3%K)]%c $4":"$G [Bots($1:$2/$3)] $4"

include/cset.h

@@ -260,6 +260,7 @@ FORMAT_NICK_MSG_FSET,
 FORMAT_NONICK_FSET,
 FORMAT_NOTE_FSET,
 FORMAT_NOTICE_FSET,
+FORMAT_NOTICE_GROUP_FSET,
 FORMAT_NOTIFY_OFF_FSET,
 FORMAT_NOTIFY_ON_FSET,
 FORMAT_NOTIFY_SIGNOFF_FSET,

include/hook.h

@@ -90,6 +90,7 @@ enum HOOK_TYPES {
 	NICKNAME_LIST,
 	NOTE_LIST,
 	NOTICE_LIST,
+	NOTICE_GROUP_LIST,
 	NOTIFY_LIST,
 	NOTIFY_HEADER_LIST,
 	NOTIFY_SIGNOFF_LIST,