osrf_control support for router re/de register and reload commands

[Bill Erickson]

From the commit:

Added support for the following new command line options in osrf_control:

--router-de-register
--router-de-register-all
Sends a SIGUSR1 signal to the selected service(s), which causes each service's listener process to send an "unregister" command to all registered routers. The --all variant sends the signal to all running listeners. The non-(--all) variant requires a --service.

--router-re-register
--router-re-register-all
Sends a SIGUSR2 signal to the selected service(s), which causes each service's listener process to send a "register" command to all configured routers routers. The --all variant sends the signal to all running listeners. The non-(--all) variant requires a --service.

--reload
--reload-all
Sends a SIGHUP signal to the selected service(s). SIGHUP causes each Listener process to reload its opensrf_core.xml config file and gracefully re-launch drone processes. The -all variant sends the signal to all services. The non-(-all) variant requires a --service.

Le Code:

http://git.evergreen-ils.org/?p=working/OpenSRF.git;a=shortlog;h=refs/heads/user/berick/osrf-control-router-and-reload-sigs

[Galen Charlton (gmc)]

Pushed to master and rel_2_3. Thanks, Bill!