Michal Čihař - Weekly phpMyAdmin contributions 2017-W49

Last week was a bit calmer, the most visible part probably being release of the SQL parser with several fixes with improved SQL context handling.

Handled issues:

• #13855 User authentication via PAM not working.
• #13851 Database EXPORT does not double single-quotes in columns containing a single quote
• #13853 Call to undefined method PMA\\libraries\\Util::sqlAddSlashes()
• #13728 PhpMyAdmin\SqlParser\Exceptions\LoaderException: Specified context does not exist.