Change to upstream provided mirror for relases.
Switch to new valid PGP key 19882D92DDA4C400C22C0D56CC2AF4472167BE03 for which upstream provided signatures on their website
https://invisible-island.net/public/public.html
Add patch to prevent linking against test libraries.
Add patch to fix leaking of flags into pkgconfig files:
https://bugs.archlinux.org/task/68523
Compile with flag for versioned symbols:
https://bugs.archlinux.org/task/72278
Sort configure flags mainly alphabetically.
Replace the use of echo with printf and sort fixes in package() by topic.
David Runge