Add Polish translation of error messages.

PR:             25101
Submitted by:	Tomasz Kepczynski <tomek jot23.org>
Reviewed by:	Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102085 13f79535-47bb-0310-9956-ffa450edef68