Fixed the call to esc2underscore() which had to be changed since that function is no longer implemented using the Regex class.
Fixed the call to esc2underscore() which had to be changed since that function is no longer
implemented using the Regex class.

OPENDAP/dap-server,OPENDAP/dap-server,OPENDAP/dap-server,OPENDAP/dap-server,OPENDAP/dap-server