New port: net/asterisk-chan_sccp

Replacement for the SCCP channel driver in Asterisk.
Extended features include:

• Shared Lines,
• Presence / BLF,
• Customizable Feature Buttons,
• Custom Device State.
• Conference with Phone-UI

WWW: https://sourceforge.net/projects/chan-sccp-b

PR: 204346
Submitted by: Diederik de Groot <ddegroot@talon.nl>