News: GPFS sudo mount, /data no longer auto-mounted, Undulator wake-up, keyring, ftp download

Extended sudo: Users may now execute
```
  /bin/mount /gpfs
  /bin/mount /common
```
To be used, if GPFS comes back after a maintenace outage and the file system is not re-mounted automatically.
/data (old online file server) is no longer auto-mounted. This is because we switched from yp to ldap. If /data still needs to be accessed, ask for a static mount. Contact Hannes or Marcus.
Undulator needs a wake-up (Andreas Schoeps): After a break of 187s the feed-back system of the undulator is switched off and a break is enabled (stand-by mode). This counter measure against vibrations has been implemented on request by BL scientists. The undulator still accepts move commands. However, it may take 0.1s (PEX 0.6) until the breaks are disabled and the feed-back it active.
If the linear-encoder position of the undulator drifted during stand-by, the feed-back system corrects this before the gap move begins (init sequence). Therefore a wake-up call that moves the undulator to the start position of a scan is advised. The wake-up call should be a move greater than 4 microns. Otherwise the undulator sees no need to act and does not execute the init sequence.
Normal moves (aka non-scan moves) can be issued without any wake-out calls.
If the current position of the undulator differs by more that 4 micron from the setpoint, the undulator exits the stand-by state and corrects the position. Experience shows that this happens only after a restart of the accelerator.
Updated Debian-8 section with a desctription of a keyring issue.
Portal ftp downloads give problems. This is due to the firewall configuration. IT investigates.