Apache 2.4 and apr patches

Hi!

I updated the patches and made some adjustments, please check and test the new versions!

Regarding the Apache 2.4 configuration, MaxRequestWorkers is the new MaxClients (it limits the total number of threads available), ThreadsPerChild standard value is 25, 16 should be enough for ipfire, since MaxRequestWorkers is computed by ServerLimit (default: 16) * ThreadsPerChild. MaxSpareThreads must be at least the sum of MinSpareThreads+ThreadsPerChild.

This should be very similar to the existing prefork configuration. If possible, please test it thoroughly.

Best regards, Wolfgang