Fix use of mod_ssl as a DSO linked against static SSL libraries; also stop linking all of support/* against the SSL libraries:
* acinclude.m4 (APACHE_MODULE): Define MOD_FOO_LDADD which each module .la library will be linked against. (APACHE_MODPATH_ADD): Link static modules against the provided libraries. (APACHE_CHECK_SSL_TOOLKIT): Put SSL libraries in SSL_LIBS and export that to config_vars.mk.
* support/Makefile.in: Link ab against SSL_LIBS.
* modules/ssl/config.m4: Add SSL_LIBS and distcache libraries to MOD_SSL_LDADD.