Replaced sccp_conference_end cli/ami function by sccp_conference_action, providing 'sccp conference [EndConf | Kick | Mute | Moderator | Invite] ConferenceId [ParticipantId]' functionality for CLI and AMI

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4453 43c1dc8c-776e-4df2-8ef1-6e829299be21
Replaced explode function in sccp_actions.c handle_dtu by sscanf. explode function still had reentrency issues, which caused sccp_log (debug) to be necessary for handle_dtu to work

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4454 43c1dc8c-776e-4df2-8ef1-6e829299be21
Removed explode and implode functions because of side-effects

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4455 43c1dc8c-776e-4df2-8ef1-6e829299be21