Attachment_reminder plugin - ported from https://github.com/thomasysliu/Roundcube-Plugin-Attachment-Reminder
and added user preference to disable plugin, larry support, some fixes/improvements
Improved regexp
Change license to GPLv3+
Allow row insertion at a specified position (not only on top of the list)
Merge branch 'master' of github.com:roundcube/roundcubemail

Conflicts:
	program/js/list.js
Limit debug log entry (line) size to 4096 characters to prevent
memory_limit/preformance issues when debug is enabled (imap, smtp, db)