use FB_ORCA_AGENT from purple-facebook

[gmartsenkov]

Fixes facebook authentication error - User must verify their account on www.facebook.com (405)
I don't understand why it fixes it really, but had the idea because i could login without a problem with pidgin.

[saligari]

I can see that the maintainer is currently looking for someone else to take over, is there anyone who has write access?

This is critical, probably solves #196 as well as #195. This can lead to complete lock for someone's facebook account so I'd say this is quite urgent to fix. I hope someone will see this and merge, personally I just found out about this project.

[jackblk]

It seems to happen again today. @gmartsenkov can you share the method to get a new correct user agent?

[gmartsenkov]

@jackblk Well previously I got the Agent from https://github.com/dequis/purple-facebook, searching for FB_API_AGENT but doesn't look like it has changed since this PR

[miztizm]

Hello guys , what FB_API_AGENT do you use ?
this one ?
#define FB_ORCA_AGENT "[FBAN/Orca-Android;FBAV/537.0.0.31.101;FBPN/com.facebook.orca;FBLC/en_US;FBBV/52182662]"

i tested most of them from here: including windows, andorid, ios and it the same problem, that makes me think that its not related to user agent.