jerboa-bin --version: add Chez Scheme attribution line

ober

c0b478c715baa5801b72d663300aaaf824ae9247

diff --git a/docs/bundling-chez.md b/docs/bundling-chez.md
index b6c7b6d..dce1f0e 100644
--- a/docs/bundling-chez.md
+++ b/docs/bundling-chez.md
@@ -20,7 +20,7 @@ part of the normal build. This doc records how that works and what's left.
 | Docker | **Done** — image builds the same `vendor/ChezScheme` (glibc + a `--static` musl variant) |
 | `--static` musl | **Done** — `support/musl-chez-build*.sh`, Docker musl stage |
 | `--static` everywhere | **Partial** — a hermetic-build knob beyond musl/Linux isn't generalized |
-| Licensing / attribution | **Partial** — root `LICENSE-CHEZ` + README credit done; `--version` line + lz4/zlib check TODO |
+| Licensing / attribution | **Partial** — `LICENSE-CHEZ`, README credit, and `--version` line done; lz4/zlib redistribution check TODO |
 | Distribution story | **Open** — release-engineering decision |
 
 ## How it works today
@@ -100,9 +100,9 @@ dirs; supports multiple independent instances.
 
 ## Remaining work
 
-1. **Licensing / attribution (partly done).** Root `LICENSE-CHEZ` (the Chez
-   NOTICE + Apache 2.0 text) is in place and the README's License section
-   credits Chez. Still TODO: an attribution line in `jerboa-bin --version`, and
+1. **Licensing / attribution (nearly done).** Root `LICENSE-CHEZ` (the Chez
+   NOTICE + Apache 2.0 text) is in place, the README's License section credits
+   Chez, and `jerboa-bin --version` prints a Chez attribution line. Still TODO:
    confirm lz4/zlib (vendored under
    `vendor/ChezScheme/`) are cleared for redistribution. Compliance, not
    theory — settle it before any tagged release.
diff --git a/support/binary-entry.ss b/support/binary-entry.ss
index 700fd87..71a16bd 100644
--- a/support/binary-entry.ss
+++ b/support/binary-entry.ss
@@ -31,7 +31,10 @@
             (loop)])))]
     [(or (string=? (car args) "--version")
          (string=? (car args) "-v"))
-     (displayln "jerboa-bin 0.1.0")]
+     (displayln "jerboa-bin 0.1.0")
+     (displayln (string-append "Bundled " (scheme-version)
+                               " (Apache 2.0, (c) Cisco Systems, Inc.)"))
+     (displayln "See LICENSE-CHEZ for Chez Scheme's NOTICE and license.")]
     [(or (string=? (car args) "--help")
          (string=? (car args) "-h"))
      (displayln "Usage: jerboa-bin [<script.ss> | --version | --help]")