Added configure warning when asterisk revision goes beyond 389899 (currently not supported, we are working on it)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4657 43c1dc8c-776e-4df2-8ef1-6e829299be21
Added configure warning when asterisk revision goes beyond 389899 (currently not supported, we are working on it)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4658 43c1dc8c-776e-4df2-8ef1-6e829299be21
Add bridged_channel check to selectchannel option (sccp_features)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4659 43c1dc8c-776e-4df2-8ef1-6e829299be21