PT-1492 Update doc for pt-kill

bin/pt-kill

@@ -3543,7 +3543,7 @@ sub find {
       PTDEBUG && _d('Checking query', Dumper($query));
       my $matched = 0;
 
-      if (    !$find_spec{replication_threads}
+      if ( !$find_spec{replication_threads}
            && $ms->is_replication_thread($query) ) {
          PTDEBUG && _d('Skipping replication thread');
          next QUERY;
@@ -7604,6 +7604,18 @@ from all classes.  The C<Actions> options specify which actions will be
 taken.  At this step, there are no more classes, just a single list of
 queries to kill, print, etc.
 
+pt-kill will kill all the queries matching ANY of the specified criteria (logical OR).
+For example, using:
+
+  --busy-time 114 --match-command 'Query|Execute'
+
+will kill all queries having busy-time > 114 C<OR> where the command is C<Query> or C<Execute>
+
+If you want to kill only the queries where C<busy-time > 114> C<AND> the command is Query or 
+Execute, you need to use L<"--kill-busy-commands>:
+
+  --busy-time 114 --kill-busy-commands 'Query|Execute' 
+
 =head1 OUTPUT
 
 If only L<"--kill"> is given, then there is no output.  If only