samba: 4.7.10 -> 4.10.2

[aneeshusa]

Release notes: https://www.samba.org/samba/history/samba-4.10.2.html
Notably, Samba 4.10.0 is the first with Python 3 support,
and the 4.10 line will be the last supporting Python 2,
so switch to Python 3.

Add myself as a maintainer.

Motivation for this change

I set up Samba and wanted to use an up-to-date version.

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
• [WIP] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• [WIP] 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)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

[aneeshusa]

@GrahamcOfBorg test samba

[xeji]

@GrahamcOfBorg build samba sambaFull

[xeji]

Local build of sambaFull on x86_64-linux fails in configurePhase with
Samba AD DC and --enable-selftest requires lmdb 0.9.16 or later
(based on master 180aa21 with this PR)

[xeji]

fix build, see comments and ofborg logs

[bachp]

There is already Samba 4.10.2 with two additional CVE fixes: https://www.samba.org/samba/history/samba-4.10.2.html

[bachp]

samba is sucessfully building and working. Tested it on my server.

sambaFull fails with the message mentioned by @xeji. Adding lmdb and gpgme to buildInputs makes it compile.

[aneeshusa]

@GrahamcOfBorg build samba sambaFull

[aneeshusa]

@GrahamcOfBorg test samba

[aneeshusa]

Thanks for the reviews @xeji @bachp, updated to 4.10.2 and added the missing deps. (I didn't even realize we had a sambaFull!)

[bachp]

Both samba and sambaFull are now working