Use consistenly ANSI C "(void)" instead of "()" inside

http_main.c and not a mixture of it. This also removes
some gcc -Wstrict-prototype warnings.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82106 13f79535-47bb-0310-9956-ffa450edef68