Motivation for this change

fixing @r-ryantm failed updates

insight into disabling a bunch of protocols located here: https://gnunet.org/en/gnurl.html

bumped gnunet as well:

• no longer supports nss
• did a little expression clean-up

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @falsifian @vrthra

still features ssl, (just only gnutls, by design):

$ ./result/bin/gnurl --version
curl 7.65.3 (x86_64-pc-linux-gnu) libcurl/7.65.3 GnuTLS/3.6.9 zlib/1.2.11 libidn2/2.2.0
Release-Date: 2019-08-15
Protocols: http https
Features: AsynchDNS HTTPS-proxy IDN IPv6 Largefile libz NTLM SSL TLS-SRP UnixSockets

[4 built, 177 copied (713.0 MiB), 167.3 MiB DL]
https://github.com/NixOS/nixpkgs/pull/67520
2 package were build:
gnunet libgnurl