Configurations/descrip.mms.tmpl: avoid enormous PIPE commands

DCL has a total command line limitation that's too easily broken by
them.

We solve them by creating separate message scripts and using them.

Fixes #13789

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13835)

Configurations/descrip.mms.tmpl

@@ -475,25 +475,12 @@ install_final :
         @ WRITE SYS$OUTPUT "######################################################################"
         @ WRITE SYS$OUTPUT ""
         @ IF "$(DESTDIR)" .EQS. "" THEN -
-             PIPE ( WRITE SYS$OUTPUT "Installation complete" ; -
-                    WRITE SYS$OUTPUT "" ; -
-                    WRITE SYS$OUTPUT "Run @$(SYSTARTUP)openssl_startup{- $osslver -} to set up logical names" ; -
-                    WRITE SYS$OUTPUT "then run @$(SYSTARTUP)openssl_utils{- $osslver -} to define commands" ; -
-                    WRITE SYS$OUTPUT "" )
+             @{- sourcefile("VMS", "msg_install.com") -} "$(SYSTARTUP)" "{- $osslver -}"
         @ IF "$(DESTDIR)" .NES. "" THEN -
-             PIPE ( WRITE SYS$OUTPUT "Staging installation complete" ; -
-                    WRITE SYS$OUTPUT "" ; -
-                    WRITE SYS$OUTPUT "Finish or package in such a way that the contents of the directory tree" ; -
-                    WRITE SYS$OUTPUT staging_instdir ; -
-                    WRITE SYS$OUTPUT "ends up in $(INSTALLTOP)," ; -
-                    WRITE SYS$OUTPUT "and that the contents of the contents of the directory tree" ; -
-                    WRITE SYS$OUTPUT staging_datadir ; -
-                    WRITE SYS$OUTPUT "ends up in $(OPENSSLDIR)" ; -
-                    WRITE SYS$OUTPUT "" ; -
-                    WRITE SYS$OUTPUT "When in its final destination," ; -
-                    WRITE SYS$OUTPUT "Run @$(SYSTARTUP)openssl_startup{- $osslver -} to set up logical names" ; -
-                    WRITE SYS$OUTPUT "then run @$(SYSTARTUP)openssl_utils{- $osslver -} to define commands" ; -
-                    WRITE SYS$OUTPUT "" )
+             @{- sourcefile("VMS", "msg_staging.com") -} -
+             'installtop' 'datatop' "$(INSTALLTOP)" "$(OPENSSLDIR)" -
+             "$(SYSTARTUP)" "{- $osslver -}" -
+             
 
 check_install :
         spawn/nolog @ossl_installroot:[SYSTEST]openssl_ivp{- $osslver -}.com

VMS/msg_install.com

@@ -0,0 +1,14 @@
+$       ! Used by the main descrip.mms to print the installation complete
+$       ! message.
+$       ! Arguments:
+$       ! P1    startup / setup / shutdown scripts directory
+$       ! P2    distinguishing version number ("major version")
+$
+$       systartup = p1
+$       osslver = p2
+$
+$       WRITE SYS$OUTPUT "Installation complete"
+$       WRITE SYS$OUTPUT ""
+$       WRITE SYS$OUTPUT "Run @''systartup'openssl_startup''osslver' to set up logical names"
+$       WRITE SYS$OUTPUT "then run @''systartup'openssl_utils''osslver' to define commands"
+$       WRITE SYS$OUTPUT ""

VMS/msg_staging.com

@@ -0,0 +1,31 @@
+$       ! Used by the main descrip.mms to print the statging installation
+$       ! complete
+$       ! message.
+$       ! Arguments:
+$       ! P1    staging software installation directory
+$       ! P2    staging data installation directory
+$       ! P3    final software installation directory
+$       ! P4    final data installation directory
+$       ! P5    startup / setup / shutdown scripts directory
+$       ! P6    distinguishing version number ("major version")
+$
+$       staging_instdir = p1
+$       staging_datadir = p2
+$       final_instdir = p3
+$       final_datadir = p4
+$       systartup = p5
+$       osslver = p6
+$
+$       WRITE SYS$OUTPUT "Staging installation complete"
+$       WRITE SYS$OUTPUT ""
+$       WRITE SYS$OUTPUT "Finish or package in such a way that the contents of the directory tree"
+$       WRITE SYS$OUTPUT staging_instdir
+$       WRITE SYS$OUTPUT "ends up in ''final_instdir',"
+$       WRITE SYS$OUTPUT "and that the contents of the contents of the directory tree"
+$       WRITE SYS$OUTPUT staging_datadir
+$       WRITE SYS$OUTPUT "ends up in ''final_datadir"
+$       WRITE SYS$OUTPUT ""
+$       WRITE SYS$OUTPUT "When in its final destination,"
+$       WRITE SYS$OUTPUT "Run @''systartup'openssl_startup''osslver' to set up logical names"
+$       WRITE SYS$OUTPUT "then run @''systartup'openssl_utils''osslver' to define commands"
+$       WRITE SYS$OUTPUT ""