No --appendable code exists inside brotli.c

[gitcnd]

Doc says "Additionally the CATABLE and APPENDABLE options are exposed..." except only the option --catable is exists in the brotli.c file - no "appendable". (also, note, appendable is spelled wrongly, apendable, in some places)

Also, it says "Specifically CATABLE files can be concatenated in any order" ... however - this test simply omits anything appended:

ls | ./brotli_tool --catable > outac.br ; pwd | ./brotli_tool --catable >> outac.br ; cat outac.br | ./decompressor | tail

(and, for what it's worth, "cat outac.br | brotli -d" reports "corrupt input [con]")