The original neomutt source was repackaged to remove the autosetup/jimsh0.c
file, which is a generated bootstrap of jimtcl; this was reported in
https://bugs.debian.org/882717.

A build dependency on jimsh was put in place to replace the file.

Neomutt has a separate repository with test files [1] that is needed in order
to execute tests. So we use uscan's Multiple Upstream Tarball (MUT) feature to
include it in the source package.

[1] https://github.com/neomutt/neomutt-test-files
