Hello!

I've noticed a bug with Pan 0.139 (GIT bf56508). It looks like that it is 
wrapping header lines longer then 80 characters. I'm not sure is it exactly 80 
characters but it is definitely around 75 - 80 characters. This is proper 
behaviour for some headers but if you add your custom headers, i.e. X-Face 
header then it will wrap that long header line in multiple lines which breaks 
the article header format and that article will be rejected by the news server.

You can test this with setting some custom header i.e.:
X-Foo: 
BaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaR and 
save this article in some file and then view that file in some editor and the 
above line should look like this.
 X-Foo:
    
BaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaR

Since X-Face header is much longer then this example it will be wrapped in 
multiple lines.

I've tried to search in the source what causes this behaviour but couldn't find 
the relevant parts of code. If someone can point me to relevant parts of code 
which are parsing and wrapping/trimming header lines then I would gladly look 
and try to produce a patch.

Thanks!

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