LyX shouldn't store a configure cache

[sven@…]

Hi,
this is a forward from the Debian BTS
​http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=397464

Original report:
"""
When first starting lyx, one gets an impressive list of
+checking for "pplatex"... no
+checking for "latex"... yes

etc, and seems to store the result in ~/.lyx/ . The problem comes when
~ is stored on an NFS server, and available on other fairly different
systems, with/without pplatex, etc. The problem also comes just when
you install/deinstall packages in Debian. So storing a cache of
available programs/packages/... doesn't really make sense, particularly
since the reconfiguration doesn't take so long.
"""

Maybe it's possible to make it optional if you'd like to have a cache or not?

[lasgouttes]

This cache is a set of defaults (what programs to use) for lyx and also
some discovery of the available latex packages. I am not sure that
it would be possible to do it at run time.

If the same homedir is shared among very different architectures, it may be wise
to use LyX with a different -userdir flag.

[Juergen Spitzmueller]

We need this cache file. And the reconfiguration can take quite long, depending
on the system/OS.