K 10
svn:author
V 4
ache
K 8
svn:date
V 27
2016-08-22T22:28:41.359633Z
K 7
svn:log
V 349
1) Back out r304607 case 2). fgetwln() as its pair fgetln() supposed to
return partial line on any errors. See the comment in fgetln.c.
Add corresponding comment to fgetwln() too.
2) Rewrite r304607 case 1).
3) Remove "Fast path" from __fgetwc_mbs() since it can't detect encoding
errors and ignores them all.

PR:     212033
MFC after:      7 days

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