Backport from HEAD:

* server/protocol.c (ap_rgetline_core): Never NUL terminate at
(*s)[-1] for caller-supplied *s.

Submitted by: Rici Lake <ricilake speedy.com.pe>
Reviewed by: jorton, jerenkrantz, trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@105278 13f79535-47bb-0310-9956-ffa450edef68