Add better logging in dnsproc write* fail

Fix typos

Add comms[com] to readbuf malloc failure

Improve verbosity of malloc failures

Log errno in vwarn

Improve verbosity of unknown op errors

Fix vasprintf implementation

Fix setuid/setgid code

Verify SSL connections with curl

Remove meson_options.txt, update README.md

Clarify changes from acme-client

Update & install man page

Fix typo in readme

Update README.md

Remove usage of BSD's err.h

Replce config.h with util-portable.h

Clean up awful code style

This guy must get off on parenthesis or something

Style: sort includes

Switch to meson for builds

Are we portable enough yet

Remove dependency on libbsd