Also adds support for the optional extensions glpk, gsl, fftw and
enables tests.

pythonPackages.fpylll: init at 0.3.0dev

docker# [   11.054736] d24d6cdd57c9[763]: /bin/bash: error while loading
shared libraries: libreadline.so.7: cannot open shared object file:
Permission denied
docker# /bin/bash: error while loading shared libraries:
libreadline.so.7: cannot open shared object file: Permission denied
docker: exit status 127
docker: output:
error: command `docker run --rm -u 1000:1000 bash /bin/bash --version'
did not succeed (exit code 127)
command `docker run --rm -u 1000:1000 bash /bin/bash --version' did not
succeed (exit code 127)

docker-tools: add a test for permissions issues with AUFS/overlay

cliquer: init at 1.21

cvxopt: 1.1.7 -> 1.1.9, add optional extensions

Socket6.xs redefines `PV_sv_undef`, which breaks compilation from
306d5cd ("perlPackages: Add cross-compilation support."). I added a patch
to remove this redefinition. Compilation is now working again.

rpy2: unbreak build

lxd: 2.16 -> 3.0.0; fixes build

linuxPackages.splLegacyCrypto: fix build