erlc: fix typo in update_erlcinfo/3 clause
Merge pull request #289 from tuncer/semicolon-vs-comma

erlc: fix typo in update_erlcinfo/3 clause
erlc: replace if expression with case of

Motivated by the bug fix in 2c4d7d1.
Merge pull request #290 from tuncer/erlc-case-of

erlc: replace if expression with case of
Add {prefix, atom()} option for abnfc_opts

Specify the atom to use as a prefix for the decoder and generator
functions inside the parser's module.  Default is ''.
Add {parser, module()} option for abnfc_opts

Specify the module to use for parsing the ABNF grammars.  Default is
'abnfc_rfc4234'.
Add {qc, proplist()} option for abnfc_opts

Specify the options to use for the generator functions inside the
parser's module.  Default is [].