create pbx_pbx_start function, remove define, references #154

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4967 43c1dc8c-776e-4df2-8ef1-6e829299be21
check for pickup extension in extensionstatus lookup, references #154

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4968 43c1dc8c-776e-4df2-8ef1-6e829299be21
remove unused function sccp_sk_set_keystate

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4969 43c1dc8c-776e-4df2-8ef1-6e829299be21
move sccp_softkey_setSoftkeyState to success states

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4970 43c1dc8c-776e-4df2-8ef1-6e829299be21