Update version info.

FIXES

@@ -25,6 +25,11 @@ THIS SOFTWARE.
 This file lists all bug fixes, changes, etc., made since the AWK book
 was sent to the printers in August, 1987.
 
+January 24, 2020:
+	A number of small cleanups from Christos Zoulas.  Add the close
+	on exec flag to files/pipes opened for redirection; courtesy of
+	Arnold Robbins.
+
 January 19, 2020:
 	If POSIXLY_CORRECT is set in the environment, then sub and gsub
 	use POSIX rules for multiple backslashes.  This fixes Issue #66,

awk.h

@@ -60,7 +60,7 @@ extern bool	safe;		/* false => unsafe, true => safe */
 #define	RECSIZE	(8 * 1024)	/* sets limit on records, fields, etc., etc. */
 extern int	recsize;	/* size of current record, orig RECSIZE */
 
-extern char	EMPTY[];
+extern char	EMPTY[];	/* this avoid -Wwritable-strings issues */
 extern char	**FS;
 extern char	**RS;
 extern char	**ORS;

main.c

@@ -22,7 +22,7 @@ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
 THIS SOFTWARE.
 ****************************************************************/
 
-const char	*version = "version 20200119";
+const char	*version = "version 20200124";
 
 #define DEBUG
 #include <stdio.h>