Code Sync with Private GIT

Code Sync with Private GIT

changes)
fix the defects found by prevent tool
remove mutex lock/unlock in case of invalid id
support the status of download in case of getting new connection with requestid
clear db, register notification when stopped the download
Update notification function
Enable to set the defined file name by user
event thread does not deal in some state
fix the lockup by mutex and the crash by invaild socket event
Resolve a bug of return type

	modified:   CMakeLists.txt
	modified:   include/download-provider-db.h
	modified:   include/download-provider-notification.h
	modified:   include/download-provider.h
	modified:   packaging/download-provider.spec
	modified:   src/download-provider-db.c
	modified:   src/download-provider-ipc.c
	modified:   src/download-provider-notification.c
	modified:   src/download-provider-receiver.c
	modified:   src/download-provider-utils.c