When enabling wacom put xsetwacom in PATH.

I know that gnome/kde may have their own way to configure wacom tablets
Add options for user and group to run nginx as.
Add option to compile in full WebDAV support.
Make nginx uid and gid optional.
Add braces to fix compilation errors.
I don't understand how Apache gets away without them.
Manual: _SYSTEMD_UNIT -> -u
Don't start nscd if it's not already running

"systemctl restart" will start a service if it's not already
running...
Increase PostgreSQL's shutdown timeout to 3 minutes

1 minute is too short, given that the autovacuum launcher often seems
to require exactly 1 minute to shut down.  (This might be a bug
related to autovacuum_naptime.)
Adding miniupnpc to gnunet path, to be able to use upnp
Adding synclient to systemPackages if synaptics is enabled.
systemd.nix: Use environment.etc attribute syntax
Fix suspend in systemd

Systemd 203 expects the file /etc/systemd/sleep.conf to exist,
otherwise suspend doesn't work.
Apparmor: add a warning
Apparmor: check that we are running an AppArmor-enabled kernel.
AppArmor: try converting to a systemd unit
AppArmor profiles for SUID binaries. At this moment only for ping.
transmission.service: fix ignored ExecReload setting

This is what currently happens (from the journal log):

  [/nix/store/HASH-unit/transmission.service:27] Executable path is not absolute, ignoring: kill -HUP $MAINPID

Fix it by using absolute path to kill.
Merge pull request #161 from bjornfor/transmission

transmission.service: fix ignored ExecReload setting
add openvpn plugin to networkmanager
Merge pull request #162 from NixOS/nm_openvpn

add openvpn plugin to networkmanager
Fix pxe network boot