+@item
+This function requires super-user privileges to create a fifo:
+FreeBSD 7.2, OpenBSD 3.8.
+@item
+This function mishandles trailing slash on some platforms:
+FreeBSD 7.2, Solaris 9.
+@item
+This function is missing on some platforms; however, the replacement
+always fails with @code{ENOSYS}:
+mingw.