Backports: r1483005

Submitted by: jailletc36
core: Do not over allocate memory within 'ap_rgetline_core' for the common case.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x-merge-http-strict@1775767 13f79535-47bb-0310-9956-ffa450edef68