bug#15436: 24.3.50; reads ~/.mailcap only once

[Gregor Zattler]

Hi Eli, emacs developers,
* Gregor Zattler <telegraph@gmx.net> [22. Sep. 2013]:
>>> When opening a file link to say an image or PDF document within
>>> org-mode via C-u C-u C-c C-o Emacs reads (in default
>>> configuration) ~/.mailcap in search for a application to open the
>>> file with.  If one then changes this ~/.mailcap, saves it and opens
>>> the same file again it is opened via the mailcap entry before the
>>> change.
>>
>> Does it help to invoke "M-x mailcap-parse-mailcaps RET"?
> 
> Yes.  Thanks for this pointer.  
> 
> I still consider this to be a bug.  Emacs should behave as
> configured in .mailcap not as in an old version of it.  If the
> Emacs developers consider this behaviour to be ok then it should
> be documented somewhere.

This could be a use case for the inotify infrastructure.  (Way
beyond my skills).

Ciao, Gregor
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