Error: Could not connect to GitHub with 3.0.0-alpha

[Lavsteph]

Steps to reproduce the issue

1 - GitHub authentication

2 - Apply patch : error to connect to Github

Actual result

for exemple

System information (as much as possible)

PHP Built On Linux servv16232.srv.odns.fr 2.6.32-042stab113.11 #1 SMP Fri Dec 18 17:32:04 MSK 2015 x86_64
Database Version 5.5.43-37.2
Database Collation utf8_general_ci
Database Connection Collation utf8mb4_general_ci
PHP Version 5.6.24
Web Server Apache 2.4.23
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 3.6.1-rc1 Release Candidate [ Noether ] 28-July-2016 23:25 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:47.0) Gecko/20100101 Firefox/47.0

Additional comments

[MATsxm]

Should be related to #165
@mbabker could you confirm it will be fixed with the next release.
Note: I asked Stéphane to "play" with the Alpha version for testing.

[mbabker]

Already fixed in master