MFC r291359,r291362:

MFC r291359,r291362:

r291359:

Skip over lines that start with # (comments)

r291362:

r291359 was incorrect. Skip over tokens that start with `#' as fgetln can
return more than one '\n' delimited line in a buffer

Handle empty lines too, just in case

git-svn-id: svn://svn.freebsd.org/base/stable/10@291761 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f