MDEV-34604 mytop - fix specifying filters in .mytop

Specifying filters (filter_status, filter_user, etc) in the mytop config
previously wouldn't work, because any filter specified here was added to
the config hash as a literal string.

This change fixes that - if filter_* is defined in the config and matches
an existing filter_* key, then run the value through StringOrRegex() and
assign to the config hash.

scripts/mytop.sh

@@ -147,7 +147,12 @@ if (-e $config)
 
             if (/(\S+)\s*=\s*(.*\S)/)
             {
-                $config{lc $1} = $2 if exists $config{lc $1};
+                my ($k, $v) = ($1, $2);
+                if ($k =~ /^filter_/i) {
+                  $config{lc $k} = StringOrRegex($v) if exists $config{lc $k};
+                } else {
+                  $config{lc $k} = $v if exists $config{lc $k};
+                }
             }
         }
         close CFG;