Fix some piped log problems: bogus "piped log program '(null)'

failed" messages during restart and problem with the logger
respawning again after Apache is stopped.

PR: 21648, 24805
Reviewed by:	trawick, jerenkrantz, nd


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@102889 13f79535-47bb-0310-9956-ffa450edef68