Moved coerce_boolean() to humanfriendly package
Bug fix: Don't normalize `Depends:' lines*

* dpkg-scanpackages and compatible re-implementations like the one in
  deb-pkg-tools should apparently not normalize `Depends:' fields
  because apt can get confused by this. Somehow it uses either a literal
  comparison of the metadata or a comparison of the hash of the metadata
  to check if an updated package is available (I tried to find this in
  the apt sources but failed to do so due to my limited experience with
  C++). So when the `Depends:' line in the Packages.gz file differs from
  the `Depends:' line in the binary control file inside a *.deb, apt
  will continuously re-download and install the same binary package ...