Log Message:
update to bozohttpd 20210227.

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().