use msg bind group directly

Signed-off-by: xiehuc <xiehuc@gmail.com>
fix delete friends crash

Signed-off-by: xiehuc <xiehuc@gmail.com>
fix: close conversation when quit group

Signed-off-by: xiehuc <xiehuc@gmail.com>

Signed-off-by: xiehuc <xiehuc@gmail.com>
change discu member search markname also

Signed-off-by: xiehuc <xiehuc@gmail.com>
create discu add check output message

remove find_buddy_by_markname because it has included in
lwqq_buddy_find_buddy_by_name

Signed-off-by: xiehuc <xiehuc@gmail.com>