Add tests for apache, output tests/httpd.conf

Add tests for apache, output tests/httpd.conf

	* configure.in: Add tests for apache, output tests/httpd.conf

	* tests/htdigest:
	* tests/htpasswd:
	* tests/httpd.conf.in: Apache 2.2 config files for auth-test

	* tests/apache-wrapper.c (apache_init, apache_cleanup): functions
	to start/stop apache

	* tests/auth-test.c: Use apache-wrapper functions to start a local
	apache process to test authentication against, since the auth-test
	tree at developer.ximian.com went missing a long time ago. #311825

	* tests/Makefile.am (auth_test_SOURCES): use apache-wrapper.c
	(TESTS): include auth-test if HAVE_APACHE.

	* libsoup/soup-session.c (lookup_auth): Fix this in the case of a
	URI pointing to a directory rather than a file.