Revert to the 1.3.3 way of getting the server name from the scoreboard,

with a modification to make it respect the UseCanonicalName setting.
This makes things work better with mass vhosting setups.

Submitted by:   Cliff Woolley <jwoolley@wlu.edu>
Reviewed by:    Tony Finch


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@84439 13f79535-47bb-0310-9956-ffa450edef68