As of now I'm starting to sign my emails and code with a new PGP key.
The new key is attached to this email message, and available at
Key fingerprint = AC91 5EA3 0645 D9D3 D4DA E4FE B104 8932 DD3A AAA3
The new key is also signed with my previous PGP key.
This and other signatures can be verified with:
gpg --check-sigs "AC91 5EA3 0645 D9D3 D4DA E4FE B104 8932 DD3A AAA3"