Revert callforward check only for non-shared line (sccp_pbx_call)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5164 43c1dc8c-776e-4df2-8ef1-6e829299be21
Regression on l->incominglimit check (Corrected)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5165 43c1dc8c-776e-4df2-8ef1-6e829299be21
Revert skipping unknown message (regression)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5166 43c1dc8c-776e-4df2-8ef1-6e829299be21