[sr-dev] [kamailio/kamailio] topoh: fixed unmask route issue, if maksing fails for one of the routes (#1776)

[balajeesv]

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#### Description
Kamailio topoh module fails to unmask route headers under following scenario
1. uri_prefix_checks disabled
2. mask_ip configured same as public ip of kamailio host
3. interworking between tcp and udp
In this case two record-route headers are added by kamailio for the current host (during tcp to udp conversion). But second record-route is not encoded while sending response to client, but trying to decode second Route on next request from client.

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

  https://github.com/kamailio/kamailio/pull/1776

-- Commit Summary --

  * topoh: fixed unmask route issue, if maksing fails for one of the routes

-- File Changes --

    M src/modules/topoh/th_msg.c (5)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/1776.patch
https://github.com/kamailio/kamailio/pull/1776.diff

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