The b2 CLI utility is renamed to backblaze-b2 on OpenBSD, to avoid 
conflict with the Boost b2 utility.  Similary, the more specific
version named utilities are renamed to backblaze-b2v3 and 
backblaze-b2v4.  If you wish to use the b2 CLI name (or have existing
scripts which use it), you should create a symlink from b2 to
/usr/local/bin/backblaze-b2.
