Correct the error_log mess in a uniform manner. Add ap_log_rerror() which

includes the client ip address in the log message (it takes a request_rec *
instead of a server_rec *).

PR:		2661


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81871 13f79535-47bb-0310-9956-ffa450edef68