apache 2.4 "Invalid Mutex directory" patch in gentoo

etc_initd_apache2.patch

--- orig/apache2	2012-11-11 12:46:14.566069898 +0900
+++ /etc/init.d/apache2	2012-11-11 13:01:16.976170759 +0900
@@ -50,6 +50,15 @@
 		return 1
 	fi
 
+	# Create mutex directory for mod_ssl.
+	# Portage makes the directory in tmpfs at once, so it disappears after reboot.
+	# For details, see http://forums.gentoo.org/viewtopic-t-939604-start-0.html
+	MODSSL_MUTEX_DIR="$(sed -e '/^Mutex/!d;s!^Mutex  *file:\(/[^ ]*\) *ssl-cache *$!\1!' /etc/apache2/modules.d/40_mod_ssl.conf)"
+	if [ ! -d ${MODSSL_MUTEX_DIR} ]; then
+		einfo "${MODSSL_MUTEX_DIR} does not exist. creating."
+		mkdir "${MODSSL_MUTEX_DIR}"
+	fi
+
 	APACHE2_OPTS="${APACHE2_OPTS} -d ${SERVERROOT}"
 	APACHE2_OPTS="${APACHE2_OPTS} -f ${CONFIGFILE}"
 	[ -n "${STARTUPERRORLOG}" ] && APACHE2_OPTS="${APACHE2_OPTS} -E ${STARTUPERRORLOG}"