gitweb: Lift any characters restriction on searched strings

Everything is already fully quoted along the way so I believe this to be
unnecessary at this point. It would pose trouble for regexp searches.
Signed-off-by: NPetr Baudis <pasky@suse.cz>
Acked-by: NJakub Narebski <jnareb@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

gitweb/gitweb.perl

@@ -471,9 +471,6 @@ sub filter_snapshot_fmts {
 our $searchtext = $cgi->param('s');
 our $search_regexp;
 if (defined $searchtext) {
-	if ($searchtype ne 'grep' and $searchtype ne 'pickaxe' and $searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
-		die_error(undef, "Invalid search parameter");
-	}
 	if (length($searchtext) < 2) {
 		die_error(undef, "At least two characters are required for search parameter");
 	}