Update SAB to 0.7.17
- Correct PATH and PID management
Correct download dir permissions for DSM5 for NZBget, SABnzbd, Transmission, ruTorrent
Add saving of user installed plugins in roundcube

Fixes #649.
added headphones-custom SPK
Update unrar to 5.1.2
Fix termination of all sessions in gateone

Fixes #499
Merge pull request #921 from cytec/headphones

added headphones-custom SPK
Wheel
- Create cross-compiled wheels, and store in a wheelhouse
- Use WHEELS var in SPK Makefile to copy cross-compiled wheels, or create pure-python wheels
Add Mercurial SPK using wheel
Change scrypt module to wheel
Update btsync ver. to 1.3.87 (09-Apr-14)
Update wheel logic
Add symlink to Mercurial SPK
Update Syncserver SPK
- Convert to wheel
- Add Mercurial dependency
Update setuptools first to avoid issues with updating pip
Clarify Syncserver description with supported versions
Update roundcube to 1.0.0
Merge pull request #916 from billerr/patch-1

Update btsync to 1.3.87
Add mutt spk

Configured for reading Maildir mail from Synology Mail Server (if installed and user accounts are enabled for login). Reading mail from remote folders works as well although I decide not to make it configurable in wizard as it seems safer not to touch user configs in homes nor put email credentials in one global config.
This is the latest development release and not the last stable which is 7 years old. Even Red Hat uses 1.5.20 so it should be fine.
Closes #723.
Add latest archs to debian-chroot

Fixes #782, fixes #814.