changes in bozohttpd 20210227:
o new support for content types: .tar.bz2, .tar.xz, .tar.lz,
.tar.zst, .tbz2, .txz, .tlz, .zipx, .xz, .zst, .sz, .lz, .lzma,
.lzo, .7z, .lzo, .cab, .dmg, .jar, and .rar. should fix
netbsd PR#56026:
MIME type of .tar.xz file on ny{cdn,ftp}.NetBSD.org is invalid
changes in bozohttpd 20210211:
o fix various NULL derefs from malformed headers. mostly from
<emily@ingalls.rocks>.
o fix memory leaks in library interface: add bozo_cleanup().
674267e2bb