Backport from HEAD:

* support/apachectl.in: Fix a problem finding envvars if sbindir !=
bindir.

* support/suexec.c: Pass the SERVER_SIGNATURE envvar through to CGIs.

PR: 30723
Submitted by: Friedrich Haubensak, Zvi Har'El
Reviewed by: trawick, jorton, nd, slive


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@104769 13f79535-47bb-0310-9956-ffa450edef68