[Bug-wget] patch to activate itimer support

[Tim Ruehsen]

I realised that there is conditional itimer code in utils.c for alarm_set() 
and alarm_cancel(). It needs ITIMER_REAL to be defined, which is done in 
sys/time.h (Linux, BSD, maybe other OSes).

Since the fallback code calls alarm(), no sub-second timeout is available.
At least on a current Debian SID, where sys/time.h is not implicitely 
included.

The attached patch adds #include <sys/time.h> to fix the issue.

Tim

itimer.diff
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