Accept bare newlines as well

[MarcelWaldvogel]

To support the IETF's general Robustness principle, I would recommend to accept bare newlines as well on parsing. However, I would also understand if you wanted to remain tight on what input you wanted to accept.

[kelseykm]

The robustness principle is a good one to keep in mind for most cases but I feel that on major/foundational areas of a specification, no compromise should be made because it tends to harm more than help.
I place line delimiting in that category, along with the charset.