array: fix build with clang 3.4

clang 3.4 warns about unused inlined function from the currently compiled
.c file, as a consequence all meta-generated function must be marked as
potentially unused.

Signed-off-by: Florent Bruneau <florent.bruneau@intersec.com>
server: more portable code to deal with "sun_path".

The size of that character buffer varies from one OS to another, so unsure
the code does not depends on a hardcoded value.

Signed-off-by: Florent Bruneau <florent.bruneau@intersec.com>