vagrant: add expression
ntopng: new package

ntopng is a high-speed web-based traffic analysis and flow collection
tool. ntopng => ntop next generation.

http://www.ntop.org/products/ntop/
nixos: add ntopng service

ntopng is a high-speed web-based traffic analysis and flow collection
tool. Enable it by adding this to configuration.nix:

  services.ntopng.enable = true;

Open a browser at http://localhost:3000 and login with the default
username/password: admin/admin.
renpy: update to 6.16.3
Add shellinabox
apr: Update to 1.5.0
linux: Update to 3.4.73
Add initial configuration for Google Compute Engine
Remove a hardcoded SSH public key from the Google Compute image.
fail2ban: Fix preStart action

Creating /run/fail2ban didn't work since it didn't have write
permission to /run.  Now it does.

Reported by Thomas Bereknyei.
dmidecode: set meta.platforms to linux
flpsed: update from 0.7.0 to 0.7.1
fping: update from 3.4 to 3.8
geany: update from 1.23 to 1.23.1
gengetopt: update from 2.22.5 to 2.22.6
geos: update from 3.3.8 to 3.4.2
gkrellm: update from 2.3.4 to 2.3.5
global: update from 6.2.2 to 6.2.9
glpk: update from 4.47 to 4.52.1
gnome.gnome_doc_utils: update from 0.20.7 to 0.20.10