Implement a default avatar

After having billion line's worth of discussion, here's a simple line change to implement the default avatar. Avatar made by mashby.

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Merge pull request #2257 from Dragooon/release-2.1

Implement a default avatar
Fix an undefined variable error on Subs-Auth.php
If you failed a login attempt, SMF tries to log to the error log describing the failure. This error caused SMF to not log the IP associated to said user and PHP to throw an undefined variable error. This commit fixes both.

Signed-off-by: Yoshi2889 <rick.2889@gmail.com>
Merge pull request #2258 from Yoshi2889/auth-fix

Fix an undefined variable error on Subs-Auth.php
! Fix bug introduced in 5e9ad31775de5fbfc2709dac49601b46d8a10b1d

Signed-off-by: John Rayes <live627@gmail.com>
Fix fifth issue mentioned in #2169

Signed-off-by: John Rayes <live627@gmail.com>
Merge branch 'release-2.1' of https://github.com/SimpleMachines/SMF2.1.git into release-2.1