Make rsrv register itself using a DBD file

This allows the rsrv to be excluded by removing 'include rsrv.dbd'
from a local copy of the base.dbd file.
Server initialization, running and pausing are moved to new
methods of the dbServer object, and the existing registration
path is converted to just use the new rsrv.dbd file.

src/std/softIoc/base.dbd

@@ -26,3 +26,5 @@ include "asSub.dbd"
 # IOC Core variables
 include "dbCore.dbd"
 
+# RSRV server
+include "rsrv.dbd"