- the function call will suceed even if the prefix being inserted already exists in the tree

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#### Description <!-- Describe your changes in detail --> PDT module initialization currently fails if you try to insert a prefix multiple times. We use kamailio as a loadbalancer and have had this change out in the field for quite some time now as our database often contains a prefix multiple times (associated with the same domain). Would it make sense to change the behavior in this case ?

Thanks, Vladimir.

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

https://github.com/kamailio/kamailio/pull/3485

-- Commit Summary --

* pdt: make add_to_tree() idempotent

-- File Changes --

M src/modules/pdt/pdtree.c (4)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3485.patch https://github.com/kamailio/kamailio/pull/3485.diff