XXXX Update zdump to better-handle POSIX timezones

@@ -140,58 +140,37 @@
         return (tmp);
 }
 #endif /* !defined TYPECHECK */
 
 static void
-abbrok(abbrp, zone)
-const char * const      abbrp;
-const char * const      zone;
+abbrok(const char * const abbrp, const char * const zone)
 {
         register const char *cp;
         int error = 0;
 
         if (warned)
                 return;
         cp = abbrp;
-        while (isascii(*cp) && isalpha((unsigned char)*cp))
+        while (isalpha(*cp) || isdigit(*cp) || *cp == '-' || *cp == '+')
                 ++cp;
         (void) fflush(stdout);
-        if (cp - abbrp == 0) {
-                /*
-                 * TRANSLATION_NOTE
-                 * The first %s prints for the program name (zdump),
-                 * the second %s prints the timezone name, the third
-                 * %s prints the timezone abbreviation (tzname[0] or
-                 * tzname[1]).
-                 */
+        if (cp - abbrp < 3) {
                 (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
-                    "abbreviation \"%s\" lacks alphabetic at start\n"),
-                    progname, zone, abbrp);
-                error = 1;
-        } else if (cp - abbrp < 3) {
-                (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
                     "abbreviation \"%s\" has fewer than 3 alphabetics\n"),
                     progname, zone, abbrp);
                 error = 1;
         } else if (cp - abbrp > 6) {
                 (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
-                    "abbreviation \"%s\" has more than 6 alphabetics\n"),
+                    "abbreviation \"%s\" has more than 6 characters\n"),
                     progname, zone, abbrp);
                 error = 1;
-        }
-        if (error == 0 && (*cp == '+' || *cp == '-')) {
-                ++cp;
-                if (isascii(*cp) && isdigit((unsigned char)*cp))
-                        if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
-                                ++cp;
-                if (*cp != '\0') {
-                        (void) fprintf(stderr, gettext("%s: warning: "
-                            "zone \"%s\" abbreviation \"%s\" differs from "
-                            "POSIX standard\n"), progname, zone, abbrp);
+        } else if (*cp != '\0') {
+                (void) fprintf(stderr, gettext("%s: warning: zone \"%s\" "
+                    "abbreviation \"%s\" has characters other than "
+                    "alphanumerics\n"), progname, zone, abbrp);
                         error = 1;
                 }
-        }
         if (error)
                 warned = TRUE;
 }
 
 int