Please add Adopt

Adopt is a pure Common Lisp library for parsing UNIX-style options.  It's small(ish), flexible, portable, well-documented, and supports rendering help text and man pages.

License: MIT/X11
Repository: https://bitbucket.org/sjl/adopt
More information: https://sjl.bitbucket.io/adopt/

Tests pass in SBCL, CCL, ECL, and ABCL on Ubuntu 18.04 (and should pass everywhere).