[Svn] [roundcube/roundcubemail] 728c18: Deprecate debug_level config option

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/roundcube/roundcubemail
  Commit: 728c18694316b96599cddc803064ded23fdbb2e1
      https://github.com/roundcube/roundcubemail/commit/728c18694316b96599cddc803064ded23fdbb2e1
  Author: Thomas Bruederli <thomas at roundcube.net>
  Date:   2018-08-24 (Fri, 24 Aug 2018)

  Changed paths:
    M program/include/rcmail_install.php

  Log Message:
  -----------
  Deprecate debug_level config option



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