Fix: compilation error on ast113

Fix: configure.ac remnants (again)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@6716 43c1dc8c-776e-4df2-8ef1-6e829299be21

Enh: OFFHOOK indication

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@6367 43c1dc8c-776e-4df2-8ef1-6e829299be21

Update Tag for v4.2.1

New Features in v4.2.1
 - Added CallInfo Structure
 - Passing Readonly variables to most functions (constification)

Bug Fixes
 - Fixed Asterisk-13 issues
 - Fixed Conference issues
 - Fixes pickup/gpickup issues



git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/tags/v4.2.1@6360 43c1dc8c-776e-4df2-8ef1-6e829299be21

Update NEWS / ChangeLog

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@6135 43c1dc8c-776e-4df2-8ef1-6e829299be21

Travis: Added ppa with asterisk-13 on trusty

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@6043 43c1dc8c-776e-4df2-8ef1-6e829299be21