Dropbear SSH scripts and assorted stuff.
- pick between centos 6, centos 7, chrome/chromium os
- c6 doesn't need pam, can be static
- c7 requires pam, doesn't work well/at all with static
- chromium is key-auth only
- setup custom known hosts file in cli-kex.c (
dbear_hosts?) - move bundled sortix libz to zlib-ng from github