m_getfld: Shuffle `delim' assignments slightly.
m_getfld: Shuffle `delim' assignments slightly.

Document end state of the four pointers to parts of the delimiter.
fdelimlen can be, wrongly, one less without causing problems because a
second check uses edelimlen.  The only side effect is an extra iteration
through m_getfld().

mcr/nmh,mcr/nmh