pow.3: Several bugs in glibc's pow() implementation were fixed in glibc 2.16

See https://www.sourceware.org/bugzilla/show_bug.cgi?id=3866.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/pow.3

@@ -345,6 +345,12 @@ This problem was fixed
 .\" commit c3d466cba1692708a19c6ff829d0386c83a0c6e5
 in glibc 2.28.
 .PP
+A number of bugs
+.\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=3866
+in the glibc implementation of
+.BR pow ()
+were fixed in glibc version 2.16.
+.PP
 In glibc 2.9 and earlier,
 .\"
 .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6776
@@ -359,26 +365,6 @@ Since version 2.10,
 .\" and I don't have a 2.9 system to test
 glibc does the right thing.
 .PP
-If
-.I x
-is negative,
-then large negative or positive
-.I y
-values yield a NaN as the function result, with
-.I errno
-set to
-.BR EDOM ,
-and an invalid
-.RB ( FE_INVALID )
-floating-point exception.
-For example, with
-.BR pow (),
-one sees this behavior when the absolute value of
-.I y
-is greater than about 9.223373e18.
-.\" see bug http://sources.redhat.com/bugzilla/show_bug.cgi?id=3866
-.\" and http://sources.redhat.com/bugzilla/show_bug.cgi?id=369
-.PP
 In version 2.3.2 and earlier,
 .\" FIXME . Actually, 2.3.2 is the earliest test result I have; so yet
 .\" to confirm if this error occurs only in 2.3.2.