Add new INCLUDE directive to mapfiles. HTCONDOR-46
Add new INCLUDE directive to mapfiles. HTCONDOR-46

This allows the sysadmin to include all the files in a given
directory into a mapfile.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor