HTTP 1.1 rev 6 BNF erratum

I don't know if this rates high enough to include on an errata list, but
the BNF in section 3.6.1 "Chunked Transfer Coding" for trailer reads:

   trailer        = *entity-header

when it really ought to read:

   trailer        = *(entity-header CRLF)

The rest of the BNF in this section is very explicit, and chunked encoding
is new in HTTP 1.1, so this might be worth fixing.

Ross Patterson
VM Software Division
Sterling Software, Inc.