$ comrak -e autolink
[https://foo.com]

[[https://foo.com]]

{https://foo.com}
$ comrak -e autolink --relaxed-autolinks
[https://foo.com]

[[https://foo.com]]

{https://foo.com}
$ comrak -e autolink
smb:///Volumes/shared/foo.pdf

irc://irc.freenode.net/git

rdar://localhost.com/blah
$ comrak -e autolink --relaxed-autolinks
smb:///Volumes/shared/foo.pdf

irc://irc.freenode.net/git

rdar://localhost.com/blah
$ comrak -e autolink
http://example.com/[abc]]...
$ comrak -e autolink --relaxed-autolinks
http://example.com/[abc]]...