mercurial: fix caveats.

Closes #25643.
git-integration 0.2 (new formula)

Closes #25186.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
elixir 0.12.1

Closes #25644.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mongo-c 0.90.0

Closes #25194.
Closes #25641.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
jansson 2.5

Closes #25648.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
lighttpd: run autogen.sh to ensure configure works

Fixes #25649.