* [a0d9972]->[21d1619] freopen: Don't crash if the filename argument is NULL.
* [a5a35f0]->[c4596b1] freopen: Documentation.
+ * [9926b90]->[395f9e6]] tests: avoid spurious assertion failure in test-float.c on ppc64
+ * [8b18afa]->[c948e19] sys_select: Avoid a syntax error regarding timespec_t on IRIX 6.5.
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