statx.2: statx() has no wrapper and must be called using syscall()

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

man2/statx.2

@@ -41,19 +41,11 @@ statx \- get file status (extended)
 .BI "int statx(int " dirfd ", const char *" pathname ", int " flags ","
 .BI "          unsigned int " mask ", struct statx *" buf );
 .fi
-.sp
-.in -4n
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.in
-.ad l
-.PD 0
-.sp
-.RS 4
-<unknown as yet>
-.RE
-.PD
-.ad
+
+.IR Note :
+There is no glibc wrapper for
+.BR renameat2 ();
+see NOTES.
 .SH DESCRIPTION
 .PP
 This function returns information about a file, storing it in the buffer
@@ -475,8 +467,12 @@ is relative and
 is a file descriptor referring to a file other than a directory.
 .SH VERSIONS
 .BR statx ()
-was added to Linux in kernel 4.11;
-library support is not yet added to glibc.
+was added to Linux in kernel 4.11.
+.SH NOTES
+Glibc does not (yet) provide a wrapper for the
+.BR statx ()
+system call; call it using
+.BR syscall (2).
 .SH SEE ALSO
 .BR ls (1),
 .BR stat (1),