remove set cookie

Signed-off-by: xiehuc <xiehuc@gmail.com>
timeout=0 means a small default delay

Signed-off-by: xiehuc <xiehuc@gmail.com>
add check msg lost for group message

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

使用pkg-config来动态链接lwqq库

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