bug#43180: [PATCH] scripts: system: Expand some help messages.

[Efraim Flashner]

* guix/scripts/system.scm (show-help): Add to '--share=SPEC' and
'--expose=SPEC' that it also works for containers.
---
 guix/scripts/system.scm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index b75b0e5b60..be17bc1ba7 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -7,6 +7,7 @@
 ;;; Copyright © 2019 Christopher Baines <mail@cbaines.net>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2020 Julien Lepiller <julien@lepiller.eu>
+;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -956,9 +957,11 @@ Some ACTIONS support additional ARGS.\n"))
   (display (G_ "
       --save-provenance  save provenance information"))
   (display (G_ "
-      --share=SPEC       for 'vm', share host file system according to SPEC"))
+      --share=SPEC       for 'vm' and 'container', share host file system
+                         according to SPEC"))
   (display (G_ "
-      --expose=SPEC      for 'vm', expose host file system according to SPEC"))
+      --expose=SPEC      for 'vm' and 'container', expose host file system
+                         according to SPEC"))
   (display (G_ "
   -N, --network          for 'container', allow containers to access the 
network"))
   (display (G_ "
-- 
2.28.0