OpenBSD upgrade script.

• 2014-09-26 : Pull in the fixes for etc and xetc set removal.

• Upgrade to a release, or to snaps.
• Store config options in an rc file.
• Auto # cpu detection.
• Auto detection of arch type for arm: OMAP, IMX.
• Signing support with signify(1)

ftp https://raw.github.com/qbit/snap/master/snap
sudo install -m 755 snap /usr/local/bin

• -s force snap to use snapshots.
• -S do not check signatures.
• -c specify location of config file (default is ~/.snaprc)
• -e just extract sets in DST.
• -a use instead of what is 'arch' returns.
• -m use instead of what 'machine -s' returns.
• -v used to force snap to use (examples: snapshots or 5.3).
• -V used to force snap to use for sets (example: -V 5.3). Note: this will only apend 53 to sets, ie base53.tgz
• -r run sysmerge after extracting {x}sets.
• -x do not extract x11 sets.
• -M specify a mirror to use (example: " -M ftp3.usa.openbsd.org")
• -i interactive with colors
• -n force using bsd.mp as bsd
• -k only install kernels and exit
• -B do not backup current kernel
• -h help

To update to the latest snapshot using an explicit mirror region:

snap -s -M ftp3.usa.openbsd.org

To update to the lastest version of 5.3 without updating xsets:

snap -v 5.3 -V 5.3 -x -M ftp3.usa.openbsd.org

 INTERACTIVE:true
 DST:/tmp/upgrade
 MERGE:true
 MIRROR:ftp3.usa.openbsd.org
 NO_X11:true