Don't merge yet, it needs some more work

Ok not wip anymore.

I just completed successfully a nox-review pr 30846 on my server running nixos-17.09-small :

Result in /run/user/1000/nox-review-1i83i6xc
total 0
lrwxrwxrwx 1 renaud users 56 28 oct.  01:37 result -> /nix/store/ygk4rak9hy7cig1501fqwzp73w7iz3a5-amarok-2.8.0
lrwxrwxrwx 1 renaud users 67 28 oct.  01:37 result-10 -> /nix/store/ppgazy2x6b8dxwhspd35x4w9wlannnaz-qtscriptgenerator-0.1.0
lrwxrwxrwx 1 renaud users 56 28 oct.  01:37 result-11 -> /nix/store/swfi0cjwxybk913fi167bs202haifxz8-arora-0.11.0
lrwxrwxrwx 1 renaud users 53 28 oct.  01:37 result-12 -> /nix/store/04m2rw2dh4fiaw6x6xzaw8y44s9l3bmj-kippo-0.8
lrwxrwxrwx 1 renaud users 57 28 oct.  01:37 result-13 -> /nix/store/1wzzdsvmp7fhx8bkxw8k64qyv2blj5hl-hyenae-0.36-1
lrwxrwxrwx 1 renaud users 56 28 oct.  01:37 result-2 -> /nix/store/ra78vja84m37zcjjkq80m27y0nghw6x4-udptunnel-19
lrwxrwxrwx 1 renaud users 65 28 oct.  01:37 result-3 -> /nix/store/pzb7rfxs6kmr60vrxrlrgjvwfl1hh5y5-open-vm-tools-10.1.10
lrwxrwxrwx 1 renaud users 68 28 oct.  01:37 result-4 -> /nix/store/977jh7plhs9fl0r5iiy79isjxn9p5rrp-fcitx-mozc-2.20.2673.102
lrwxrwxrwx 1 renaud users 58 28 oct.  01:37 result-5 -> /nix/store/0pyk5rz69939ig4hhhiniw5z7y0d54s9-gwt-java-2.4.0
lrwxrwxrwx 1 renaud users 53 28 oct.  01:37 result-6 -> /nix/store/93fvm0sya7xz1g25jxc9d0ckpq9yb9lz-daq-2.0.6
lrwxrwxrwx 1 renaud users 56 28 oct.  01:37 result-7 -> /nix/store/yiwpxg4v87bxxaq96v5g5iiivx5ibmfg-libdnet-1.12
lrwxrwxrwx 1 renaud users 57 28 oct.  01:37 result-8 -> /nix/store/ns31pqgrwfqdz62klqkr83rgic187djd-snort-2.9.8.2
lrwxrwxrwx 1 renaud users 65 28 oct.  01:37 result-9 -> /nix/store/y5r4c891dab83dqpg57hw8mg6a93pxwy-open-vm-tools-10.1.10

It took a little time, mostly in the build of kdelibs-4.14.36

Some websites (e.g. garmintools) do not look very official

It would also be good to afterwards go through this list of packages and see which we want to keep. I already see some old and unmaintained packages which we should drop.

Thanks for the feedbacks.

@jtojnar yes it's always a bit tricky when the former Gcode repo does not provide an explicit link to a new home. Two changes I made are debatable : garmintools and gtkdialog since they are more or less a third-party effort to clone the repo on GitHub in case the initial one should disappear.
I'm totally ok to keep the archived Gcode page as homepage for these two packages. We just don't know how long it will stay around... My guess is we will be deprecating those packages before Google decides to take it down.

@FRidh yes some of them are clearly outdated but I found myself reluctant to mark them as broken because as long as the source are available and it compiles, someone might still be using it (inside or outside of the nixpkgs tree).
The main goal of this PR was mostly about refreshing meta.homepage attributes and it would be up to the maintainers & users of each package to say what's still needed and what's not.

Two obvious cases though:

• slimrat : declared in a coma on its homepage and rapidshare does not exist anymore
• tmin : officially deprecated in favor of afl-tmin from the american fuzzy lop package already available in nixpkgs

-> Should I mark these 2 as broken ?

Fixed the homepages for garmintools and gtkdialog (back to the archived GCode page).

slimrat and tmin are marked as broken.

Concerns here?

Oh yes good call! Indeed the nox-review I ran before took some time with kdelibs...

There is still some more G.Code homepages in the repo but that is a good start I believe.
Thanks for your review on this @orivej