[PATCH] patch for lin need_source function

[Jasper Huijsmans]

Auke,

This seems to fix the problem with limitless lin's being spawned.
Doesn't seem to break anything else.

The patch removes the subshell (why was it needed?) and adds some code
to make the list unique (uniq needs a sorted list, so won't always
work). Some other thing were changed as well.

What do you think?

	Jasper


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