When enabling wacom put xsetwacom in PATH.

I know that gnome/kde may have their own way to configure wacom tablets
btrfsck doesn't respect any flags

Signed-off-by: Shea Levy <shea@shealevy.com>
Don't copy libz and liblzo2 twice to the initrd

Signed-off-by: Shea Levy <shea@shealevy.com>
Remove tabs
initrd: Add ehci_pci and hid_generic

These are required to get some (all?) USB keyboards to work in recent
kernels.
initrd: Remove serio and atkbd

These modules don't exist as far as I can tell.
tests/misc.nix: Test nixos-rebuild --help
Return exit code 127 if a command is not found
Add varnish to module-list.nix
Merge pull request #125 from MarcWeber/submit/when-enabling-wacom-add-xsetwacom-to-path

When enabling wacom put xsetwacom in PATH.
bacula: generate bconsole config
btrfs: btrfsck is now actually the same binary as "btrfs"
symlinked to save space.
filesystems: add priority option for swap devices.

Useful for setting up raid0-like load balancing for swap.
By giving multiple swap devices the same prio.
kde4: use udisks2 for kde versions that support it.

Currently, none do, although kde 4.10 is supposed to be able to use it.
mediawiki: Update to 1.20.5
zabbix: Don't set the mbstring.func_overload option

This breaks MediaWiki running in the same web server.  Zabbix no
longer seems to need it anyway.
bacula: file daemon needs to run as root
bacula: add ExecReload
systemd.sockets: Add listenStreams option for specifying several sockets