system_data_types.7: Move notes about versions to "Versions"

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/system_data_types.7

@@ -40,6 +40,8 @@ system_data_types \- overview of system data types
 .\"		* Description (no "Description" header)
 .\"			A few lines describing the type.
 .\"
+.\"		* Versions (optional)
+.\"
 .\"		* Conforming to (see NOTES)
 .\"			Format: CXY and later; POSIX.1-XXXX and later.
 .\"
@@ -902,10 +904,7 @@ type or a
 .I ssize_t
 type.
 .PP
-Conforming to:
-POSIX.1-2001 and later.
-.PP
-Notes:
+Versions:
 Prior to POSIX.1-2008, the type was capable of storing
 the largest value that can be stored in either an
 .I off_t
@@ -913,6 +912,9 @@ type or a
 .I ssize_t
 type.
 .PP
+Conforming to:
+POSIX.1-2001 and later.
+.PP
 See also the
 .I regmatch_t
 structure and the
@@ -948,10 +950,7 @@ struct sigevent {
 For further details about this type, see
 .BR sigevent (7).
 .PP
-Conforming to:
-POSIX.1-2001 and later.
-.PP
-Notes:
+Versions:
 .I <aio.h>
 and
 .I <time.h>
@@ -959,6 +958,9 @@ define
 .I sigevent
 since POSIX.1-2008.
 .PP
+Conforming to:
+POSIX.1-2001 and later.
+.PP
 See also:
 .BR timer_create (2),
 .BR getaddrinfo_a (3),
@@ -1132,10 +1134,7 @@ for printing
 .I size_t
 values.
 .PP
-Conforming to:
-C99 and later; POSIX.1-2001 and later.
-.PP
-Notes:
+Versions:
 .IR <aio.h> ,
 .IR <glob.h> ,
 .IR <grp.h> ,
@@ -1149,6 +1148,9 @@ define
 .I size_t
 since POSIX.1-2008.
 .PP
+Conforming to:
+C99 and later; POSIX.1-2001 and later.
+.PP
 See also:
 .BR read (2),
 .BR write (2),
@@ -1284,15 +1286,15 @@ or
 Used for time in seconds.
 According to POSIX, it shall be an integer type.
 .PP
-Conforming to:
-C99 and later; POSIX.1-2001 and later.
-.PP
-Notes:
+Versions:
 .I <sched.h>
 defines
 .I time_t
 since POSIX.1-2008.
 .PP
+Conforming to:
+C99 and later; POSIX.1-2001 and later.
+.PP
 See also:
 .BR stime (2),
 .BR time (2),