openvms: look for `USE_IPV6` in `config.h` (was: `ENABLE_IPV6`)

The OpenVMS script `config_h.com` is parsing the config header
generated by autotools. Let's make it look for the macro name we now
use universally across the codebase.

Follow-up to e411c98f702f0fb38dceec95e7507ef15a00d12c #13349
Closes #13360

diff --git a/packages/vms/config_h.com b/packages/vms/config_h.com
index 6378802ad84c7630185faae15e96a40825243e90..44cb0670724ba5c488e0bfd977914a57d4566443 100644 (file)
--- a/packages/vms/config_h.com
+++ b/packages/vms/config_h.com
@@ -847,7 +847,7 @@ $       goto cfgh_in_loop1
 $      endif
 $!
 $      if (key2a .eqs. "HAVE") .or. (key2a .eqs. "STAT") .or. -
-          (key2 .eqs. "ENABLE_IPV6") .or. (key2b .eqs. "LDAP")
+          (key2 .eqs. "USE_IPV6") .or. (key2b .eqs. "LDAP")
 $      then
 $!
 $!         Process extra underscores
@@ -866,7 +866,7 @@ $               double_under = 1
 $              endif
 $          endif
 $!
-$          if (key2_h .eqs. "_H") .or. (key2 .eqs. "ENABLE_IPV6") .or. -
+$          if (key2_h .eqs. "_H") .or. (key2 .eqs. "USE_IPV6") .or. -
               (key2b .eqs. "LDAP")
 $          then
 $!
@@ -892,7 +892,7 @@ $           endif
 $!
 $!             And of course what's life with out some special cases
 $!--------------------------------------------------------------------
-$              if key2 .eqs. "ENABLE_IPV6"
+$              if key2 .eqs. "USE_IPV6"
 $              then
 $                  headf = "in6"
 $              endif