Bug#944887: libemail-mime-perl: fails to handle boundary="0"

[Eric Wong]

Package: libemail-mime-perl
Version: 1.946-1
Severity: normal
Tags: upstream patch

Email::MIME fails to handle mail with a boundary value of "0",
since Perl treats 0 as false.  This is a common type of bug in
Perl code.

Reading RFC 2046, the BNF for allowed boundary characters
allows 1-70 characters, so a single "0" is acceptable:

     boundary := 0*69<bchars> bcharsnospace
     bchars := bcharsnospace / " "
     bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
                      "+" / "_" / "," / "-" / "." /
                      "/" / ":" / "=" / "?"
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