rn-91: Add links to news, articles and tools, part 1

Author: jnareb

rev_news/drafts/edition-91.md

@@ -40,15 +40,42 @@ This edition covers what happened during the month of September 2022.
 
 __Various__
 
++[SSH commit verification now supported](https://github.blog/changelog/2022-08-23-ssh-commit-verification-now-supported/)
+ in GitHub.
++[New options for controlling the default commit message when merging a pull request](https://github.blog/changelog/2022-08-23-new-options-for-controlling-the-default-commit-message-when-merging-a-pull-request/)
+ via web interface in GitHub.
+
 
 __Light reading__
 
++[Enable Gitsign Today and Start Signing your Commits](https://dev.to/erikaheidi/enable-gitsign-today-and-start-signing-your-commits-2gda)
+ with so called _keyless signing_, that is signing that relies on ephemeral keys.
+ Article by Erika Heidi on DEV\.to.
++[Switching git back to GPG signing](https://sethmlarson.dev/blog/switching-git-back-to-gpg-signing)
+ from SSH key signing, by Seth Michael Larson on his own blog.
++ See also [Signing Git Commits with SSH Keys](https://blog.dbrgn.ch/2021/11/16/git-ssh-signatures/),
+ mentioned in [Git Rev News Edition #83](https://git.github.io/rev_news/2022/01/31/edition-83/x).
++[Merging two GitHub repositories without losing commit history](https://hacks.mozilla.org/2022/08/merging-two-github-repositories-without-losing-commit-history/)
+ by Schalk Neethling on Mozilla Hacks blog; a simpler solution might be to use `git subtree`,
+ or use `subtree` merge strategy, or `ort` merge strategy with `subtree[=<path>]` strategy option.
++[.gitignore File – How to Ignore Files and Folders in Git](https://www.freecodecamp.org/news/gitignore-file-how-to-ignore-files-and-folders-in-git/)
+ by Dionysia Lemonaki o freeCodeCamp.
++[SSH Tips and Tricks](https://carlosbecker.com/posts/ssh-tips-and-tricks/)
+ by Carlos Alexandro Becker, including how to avoid having to touch Yubikey.
+
 <!---
 __Easy watching__
 -->
 
 __Git tools and sites__
 
++[Gitsign](https://github.com/sigstore/gitsign): Keyless Git signing with
+[Sigstore](https://www.sigstore.dev/), with your own GitHub / OIDC identity.
+ Written in Go.
++[`ghq`](https://github.com/x-motemen/ghq) provides a way to organize remote repository clones,
+ like `go get` does; for example when cloning it makes a directory under a specific root directory.
+ Written in Go.
+
 
 ## Credits