* modules/cache/mod_socache_dbm.c: Fix compile by including unixd.h on operating

    systems that need it, which is required for for the use of unixd_config
    inside socache_dbm_init.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@708066 13f79535-47bb-0310-9956-ffa450edef68