adding the HCMD2 option in the print_usage()

src/param.c

@@ -22,6 +22,7 @@ void print_usage() {
     "<-o>               Output directory for the docking interface\n"
     "                   If nothing is specified, the current directory is used\n"
     "<-pose>            Desired conformation. Default will compute all conformations\n"
+    "<-HCMD2>           Means that the docking file is in the HCMD2 MAXDo format\n"
     );
 }