services.cgi: Fix for depreciate-warning in httpd/error_log

This patch fixes the depreciate warning in /var/log/httpd/error_log
not to use a hash as reference

So I changed:
[...]
print %link->{$key}
[...]

To:
[...]
print $link{link}
[...]

which solves the warning and should be good in future.

Joern-Ingo Weigert <jiweigert@ipfire.org>
Add modified services.cgi to core update 68.