uniqid

First: Uniqid test (tests/strings/001.phpt) failes for cygwin because the time for gettimeofday() is only updated once per second. I suggest we should change the test to use more entropy. Second: We should consider more entropy being default even though it is slower. Third: the function is available even when HAVE_GETTIMEOFDAY is not available. This should be changed (is on out todo) or the function should return a unique value for such platforms, too. Fourth: We should split ./tests/strings/001.phpt. One for the string functions and one for uniqid(). marcus