Merge pull request #351 from alerque/upstream-autoconf

Cleanup Autoconf macro usage and source handling

Switch to upstreamed versions of Autoconf Archive macros

Remove use of brace expansion, which isn't defined in POSIX (#350)

Update IRC links since freenode does not exist as it used to (#344)

Make sure distclean hook doesn't conflict with other projects

Set automake variable before loading macros so it can be appended

Release 2.0.10

Match job order in build and release workflows

Fix release workflow so it builds the man page

Release 2.0.9

Merge pull request #343 from alerque/burninate-xz

Add intermediate artifact to Git ignore list

Gate check tooling like linters behind developer mode flag

Add macro file for configure time developer mode flag