#### Description

In a scalable `Kamailio` architecture that uses `DMQ` to share dialogs 
(profiles, essentialy) between the peers, in some cases could make sense to 
remove dialogs that were created and synced from other peers. Example: If a 
peer goes down and didn't go up again (or in a feasible time), could make sense 
to remove its synced dialogs (example: `dmq` used to implement a shared dialog 
counter per provider).

To allow it, a new function was introduced in `dialog` module: 
`dlg_remove_dialogs_from_node`.

With the new `event_routes`: `peer-up` and `peer-up`, we can easily use this 
new function to clean the dialogs based on the peer state. 

#### Pre-Submission Checklist
- [x] Commit message has the format required by CONTRIBUTING guide
- [x] Commits are split per component (core, individual modules, libs, utils, 
...)
- [x] Each component has a single commit (if not, squash them into one commit)
- [x] Code is formatted with `clang-format` using the config file 
`.clang-format`
  from source code folder
- [x] No commits to README files for modules (changes must be done to docbook 
files
  in `doc/` subfolder, the README file is autogenerated)

#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)

#### Checklist:
- [ ] PR should be backported to stable branches
- [x] Tested changes locally
- [ ] Related to issue
You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/4754

-- Commit Summary --

  * dialog: add new function dlg_remove_dialogs_from_node
  * dialog: update with master

-- File Changes --

    M src/modules/dialog/dialog.c (22)
    M src/modules/dialog/dlg_dmq.c (82)
    M src/modules/dialog/dlg_dmq.h (1)
    M src/modules/dialog/dlg_hash.c (2)
    M src/modules/dialog/dlg_hash.h (1)
    M src/modules/dialog/doc/dialog_admin.xml (40)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/4754.patch
https://github.com/kamailio/kamailio/pull/4754.diff

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