kamctl: added new options to dispatcher interface

- added a new `rmip` option to delete a specific gateway `ip` in a predefined `setid` - added a new `rmset` option to delete a specific `setid` completely

You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3512

-- Commit Summary --

* Add support for deleting a gateway or full setid in dispatcher. * Small style fix to help screen

-- File Changes --

M utils/kamctl/kamctl (34) M utils/kamctl/kamctl.base (2)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3512.patch https://github.com/kamailio/kamailio/pull/3512.diff