Conversion from old apr_lock_t to new apr_thread_mutex_t

(only converting INTRAPROCESS locks at this time).

I don't see how this used to work, which also means I'm not entirely
sure if it works now. It really didn't look like it was allocating
the correct size before. It compiles and SSL still works in my limited
tests, but I'd appreciate a second opinion.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91979 13f79535-47bb-0310-9956-ffa450edef68