Replace ap_get_server_version with ap_get_server_banner() and

ap_get_server_description().

High-level summary:

The full server version information is now included in the error log at
startup as well as server status reports, irrespective of the setting
of the ServerTokens directive.

Third-party modules must now use ap_get_server_banner() or 
ap_get_server_description() in place of ap_get_server_version().



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@440337 13f79535-47bb-0310-9956-ffa450edef68