fix handling of hardlinks and symlinks.
also compress n man pages and localized man pages

This is a feature to prefix all so:* provides with a tag. This was done
so that the openjdk8 so depends would only be satisfied by openjdk8
provides and not openjdk7, which might provide same so:lib*.so file.

To use it do: sonameprefix="openjdk8:"

Output a warning if those directories exist on a non-doc package.
Furthermore, check if uncompressed man pages where installed to
/usr/share/man.

Force dependency scanning when main pkg has noarch but subpackage
overrides it. We need to save the arch setting set in split func for
later if it differs from main pkg's arch in a temp file because the
splitfunc runs in a subprocess.

fixes #4491

This lets users 'apk add docs' to always pull in -doc packages.

overlapping variable names