If the SVN_HTTPD_PORT variable is not set, then we will not even
attempt to start a web server in the start_httpd function (despite
it's name), so there is no need to determine values for the
SVN_HTTPD_PATH and SVN_HTTPD_MODULE_PATH variables.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>