Added a version of ap_getline() that allocs a buffer from

the request's pool, rather than copying into a caller-supplied
buffer.  (This lets us eliminate one copy operation on the
request headers.)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92290 13f79535-47bb-0310-9956-ffa450edef68