Adding strndup to kernel

Hi,

would it be ok to add strndup.cpp to kernel_lib_posix.o?
I'd like to make use of it in the freebsd compat layer, where a string 
(originating in FreeBSD driver code) has to be duplicated and I have a 
bad feeling about using strdup for it.
I know of alternative approaches to implement a safe copy, but I wanted 
to ask first.

Kind Regards
Colin

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