r/gpg.md: add Claws-Mail note too

Resolves: #192
 Worsens: #191

r/gpg.md

@@ -1,7 +1,10 @@
 ---
 layout: null
 permalink: /r/gpg.html
-redirect_from: /r/gnupg.html
+redirect_from:
+  - /r/gnupg.html
+  - /r/clawsmail.html
+  - /r/claws-mail.html
 sitemap: false
 ---
 
@@ -36,3 +39,34 @@ Keybase note: To publish the key `keybase pgp select --multi` (where multi
 is required for multiple PGP keys per account and to submit changes to it,
 `keybase pgp update --all` (where --all is again necessary only if you have
 multiple keys).
+
+* * * * *
+
+Claws-mail note that is somewhat related.
+
+Debian: `sudo apt install claws-mail claws-mail-address-keeper claws-mail-attach-warner claws-mail-gdata-plugin claws-mail-pgpinline claws-mail-pgpmime claws-mail-smime-plugin`
+
+Load plugins from Configuration (menu) --> Plugins --> Load, they are all
+somewhere in `/usr/lib/x86_64-linux-gnu/claws-mail/plugins` or similar path.
+
+It wants to read `~/.signature` which I have like:
+
+```
+Mikaela Suomalainen
+https://mikaela.info/
+69FF 455A 869F 9031 A691  E0F1 9939 2F62 BAE3 0723
+
+```
+
+My other hats have like:
+
+```
+other hat, please fill this
+
+```
+
+Note the empty line in the end, as PGP/INLINE is the way to sign emails,
+it the PGP signature comes after it and in my opinion looks a bit cleaner
+with the signature ending to an empty line.
+
+* * * * *