Check for SSL Cert value before building with SSL support.
Add HTTPD SSH assertion to check null cert/key.
Check empty stringfor globalRedirect. It breaks RedirectPermanent.
rabbitmq-server: update to 3.2.1
rabbitmq-c: add version 0.4.1
libjson-rpc-cpp: minor fixes to the expression.
grsecurity: Fix build under new generic kernel derivation
grsecurity: Update stable and test patches

stable: 3.0-3.2.53-201312021727 -> 3.0-3.2.54-201401191012
test:   3.0-3.12.2-201312021733 -> 3.0-3.12.8-201401191015
add glog 0.3.3
hiphopvm: update to commit 1e23dec9f0
Add libyubikey (aka yubico-c) package
Add ykpers (aka yubikey-personalization) package
Implement authentication for a LUKS device with a yubikey (HMAC-SHA1); supports simple challenge-response and two-factor authentication
pythonPackages.tarsnapper: New expression
haskell bytestring-progress: Disable haddock to avoid a build failure.
linux-perf: Fix build (unportable shell hack broke).
mpc: (mpd client) Update to 0.25.
emacs: Allow non-GTK X11 builds (--with-x-toolkit=lucid).
STP: Simple Theorem Prover (a SMT solver for bitvectors & arrays).
nixos: Add a dictd service.