Summary: Development files to use pjproject

Description:
Header information for:
- PJSIP - Open Source SIP Stack
- PJMEDIA - Open Source Media Stack
- PJNATH - Open Source NAT Traversal Helper Library
- PJLIB-UTIL - Auxiliary Library
- PJLIB - Ultra Portable Base Framework Library

URL: https://www.pjsip.org/
License: GPLv2+

Maintainer: alien