apr_pcalloc can be turned into apr_palloc (the allocated memory is fully...

apr_pcalloc can be turned into apr_palloc (the allocated memory is fully initialized by the subsequent memcpy/strcpy) and '(int)strlen(p)' can be replaced by 'plen - 1' to save some cycles.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1833415 13f79535-47bb-0310-9956-ffa450edef68