[Asterisk-code-review] Fix deadlock handling subscribe req during res parking reload (asterisk[13])

[Giuseppe Sucameli]

Hello Matthew Fredrickson, Friendly Automation, Joshua C. Colp, 

I'd like you to reexamine a change. Please visit

    https://gerrit.asterisk.org/10701

to look at the new patch set (#4).

Change subject: Fix deadlock handling subscribe req during res_parking reload
......................................................................

Fix deadlock handling subscribe req during res_parking reload

Split destroy_hint method to separate hint removal and extension hint
state changed callback, the latter now called via stasis.
This avoids deadlock between res_parking reload that is removing the
parking lot and the related hint and subscribe requests coming for the
same parking lot.

ASTERISK-28173

Change-Id: I5b03c3455b3b12b6f83cea4cc34f4b4b20444f7e
---
M main/pbx.c
1 file changed, 55 insertions(+), 30 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/01/10701/4
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Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I5b03c3455b3b12b6f83cea4cc34f4b4b20444f7e
Gerrit-Change-Number: 10701
Gerrit-PatchSet: 4
Gerrit-Owner: Giuseppe Sucameli <sucameli at netresults.it>
Gerrit-Reviewer: Friendly Automation (1000185)
Gerrit-Reviewer: Giuseppe Sucameli <sucameli at netresults.it>
Gerrit-Reviewer: Joshua C. Colp <jcolp at digium.com>
Gerrit-Reviewer: Matthew Fredrickson <creslin at digium.com>
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