wm4 d83a9f7f03 player: don't let multiline filenames set options on resume ...

If --write-filename-in-watch-later-config is used, and the filename
contains newline characters (as generally allowed on Unix), then the
newline will be written to the resume file literally, and the parts
after the newline character are interpreted as options.

This is possibly security relevant.

Change newline characters (and in fact any other special characters)
to '_'.

Reported as #1099 (this commit is a reimplementation of the proposed
pull request).

CC: @mpv-player/stable

2014-09-16 18:23:01 +02:00

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