pua dialoginfo: improvements

[linuxmaniac]

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• 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)
• 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
• Tested changes locally

Description

Changes from Sipwise flavor:

• refresh_pubruri_avps_flag: if enabled, this message flag indicates whether to refresh R-Uri from avps before sending the PUBLISH requests.
• improvement for use_pubruri_avps: use locking to avoid crashes since we are using shared memory
• local_identity_dlg_var: reporting dialog-information will use the value of the dialog variable if exists

[miconda]

Fine to merge from my point of view!

Just a note that there might be some design issue with dialog vars, considering some reports on the tracker, but this has to be analyzed separately, not being something specific to PR, but impacts it.