fixed a problem in net.cc line 269
update protocol
Merge branch 'master' of https://github.com/li7/Ptpd1-object-oriented

Conflicts:
	classes/Current.o
	classes/Current_Driver.o
	classes/ForeignMasterRecord.o
	classes/GlobalTime.o
	classes/GlobalTime_Driver.o
	classes/MsgDelayResp.o
	classes/MsgDelayResp_Driver.o
	classes/MsgFollowUp.o
	classes/MsgFollowUp_Driver.o
	classes/MsgManagement.o
	classes/MsgManagementPayload.o
	classes/MsgSync.o
	classes/PtpClock.o
	classes/PtpClock_Driver.o