Turn on use of .htaccess to improve security

Makefile

@@ -6,6 +6,7 @@ all: httpd-conf
 	rm -rf /srv/www/installer
 	install -v -m755 -o apache -g apache -d /var/lib/roundcube
 	@echo "$$HTTPD_CONF" > /etc/httpd/conf/DirectoryIndex.conf
+	sed -i 's/^\([[:blank:]]*AllowOverride[[:blank:]]\).*/\1All/g' /etc/httpd/conf/DocumentRoot.conf
 	chown -v -R apache:apache /srv/www
 	patch -Np1 -d /srv/www < roundcubemail-1.4.8-chgsaslpasswd_fix.patch
 	cd /srv/www/plugins/password/helpers && gcc -o chgsaslpasswd chgsaslpasswd.c