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#### Description <!-- Describe your changes in detail --> This PR adds the support of using PVs in the `prefix` parameter.

Also refactors the properties into a structure for each file.

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

https://github.com/kamailio/kamailio/pull/3763

-- Commit Summary --

* file_out: Prefix can use PVs * file_out: Refactor

-- File Changes --

M src/modules/file_out/file_out.c (140) M src/modules/file_out/types.c (38) M src/modules/file_out/types.h (17)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3763.patch https://github.com/kamailio/kamailio/pull/3763.diff