SoftSnow XChat Filter 1.2.5 (from backup file)

SoftSnow XChat Filter 1.2.5 (from backup file)

Show if 'allow' rules are used at startup (at loading script).

Correction to code limiting filtering to given server.

Separate adding and deleting rules (after checking that arguments are
correct) into add_rule() and delete_rule() subroutines.

Make '/FILTER' be equivalent to '/FILTER STATUS'.  Show if filtering
is limited to current server, and to which server it is limited (if is
limited).

Add '/FILTER SERVERON' both toggles limiting to server, and turns
filter on.

Print that rules were saved or loaded from a file after action.

Small coding syle changes, correction to messages and emphasizing
messages from script, adding comments and separators (whitespace and
comments).

Signed-off-by: Jakub Narebski <jnareb@gmail.com>