Correct a mis-correlation between mpm_common.c and mpm_common.h;

This patch reverts us to pre-2.0.46 behavior, using the
ap_sock_disable_nagle noop macro, because ap_sock_disable_nagle
was never compiled on Win32.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@99418 13f79535-47bb-0310-9956-ffa450edef68