update reference

Signed-off-by: xiehuc <xiehuc@gmail.com>
Merge branch 'dev' of github.com:xiehuc/pidgin-lwqq into dev
disable send offline function

Signed-off-by: xiehuc <xiehuc@gmail.com>
adjust free pointer order

Signed-off-by: xiehuc <xiehuc@gmail.com>
add valid check and adjust free point order

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

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