The attched patch is to improve libcurl handling of gethostbyname()
results when built with uClibc.

The symptoms are a segmentation fault when a host has no aliases.

This is because libc returns a pointer to an empty list if there are
no aliases returned from gethostbyname where uClibc returns a NULL
pointer. When hostcache_fixoffset() is called to fix up the returned
offsets it attempts to relocate the NULL pointer resulting in a seg
fault.

The patch also contains some comments on the #if #else structures to
make them a bit more followable.

-- 
Regards Vincent
http://www.kyllikki.org/

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