Merge #42: Update readme

2eee38a Update readme (MarcoFalke)

Pull request description:

  Add the guix and gentoo package, which are maintained out of tree

Top commit has no ACKs.

Tree-SHA512: 4ca4d2ddc7ae171bd827ccd7fed40d27c4925bb8a47888ea1a68b4f13f33cbd04122e3ae2020a8290e84610ceb678a09de06e5a952fb48f14b1d56a7d28fb9cf

README.md

@@ -6,12 +6,13 @@ Bitcoin Core is packaged and distributed through different channels.
 Advanced users can compile Bitcoin Core from source. Static binaries for Linux, as well as installers for Windows and macOS are
 provided on the [website](https://bitcoincore.org/en/download/).
 
-In addition, this repository contains packaging metadata for package managers running on Linux. Currently
+Bitcoin Core is also distributed on several Linux package managers:
 
-* [Snappy](/snap)
-* [Debian](/debian)
-
-A spec file for flathub is maintained under their organization: https://github.com/flathub/org.bitcoincore.bitcoin-qt
+* The `bitcoin-core` snap package for https://snapcraft.io/bitcoin-core is maintained in [/snap](/snap)
+* The `org.bitcoincore.bitcoin-qt` flatpak package is maintained under their organization: https://github.com/flathub/org.bitcoincore.bitcoin-qt
+* The `bitcoin-core` guix package is maintained under https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/finance.scm
+* The `bitcoin` gentoo package is maintained under https://gitlab.com/bitcoin/gentoo
+* The [/debian](/debian) packaging is currently unmaintained, see https://github.com/bitcoin-core/packaging/issues/36
 
 An RPM spec file was removed in commit fa7c698cb24bab350b40ee2d825c443dabdd9633, because is was unmaintained and
 outdated.