GitLab

This doesn't so much actively search for things to delete. Instead it's
a required permission from the user to remove source directories (which
is similar to the remove-after-install option).

Right now this will only be used when trying to clone a git module and
the destination source directory already exists somehow, which has
happened for a lot of 1.14 early adopters due to old kde-baseapps
checkouts having a kate or konsole directory that conflict with where
kdesrc-build wants to put the current kate/konsole directories.

This commit makes the license/copyright information much more detailed
as recommended by Pino Toscano, who packages kdesrc-build for Debian.

asciidoc was a nice start, but modifying the generated XML is not too
bad (and must be done to comply with KDE documentation guidelines
anyways).

So, remove the asciidoc and instead generate man pages from DocBook XML.

I've taken the liberty of using the more specific content tags but the
overall content should be approximately the same.