Document no_build_extension and no_install_plugin settings in bundle-config

The quality spec requires all Bundler settings to be documented in
the bundle-config man page.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hsbt

bundler/lib/bundler/man/bundle-config.1

@@ -154,9 +154,15 @@ The path to the lockfile that bundler should use\. By default, Bundler adds \fB\
 \fBlockfile_checksums\fR (\fBBUNDLE_LOCKFILE_CHECKSUMS\fR)
 Whether Bundler should include a checksums section in new lockfiles, to protect from compromised gem sources\. Defaults to true\.
 .TP
+\fBno_build_extension\fR (\fBBUNDLE_NO_BUILD_EXTENSION\fR)
+Whether Bundler should skip building native extensions during installation\. When set, gems are installed without compiling their C extensions\. To build extensions later, run \fBgem pristine <gem> \-\-extensions\fR\.
+.TP
 \fBno_install\fR (\fBBUNDLE_NO_INSTALL\fR)
 Whether \fBbundle package\fR should skip installing gems\.
 .TP
+\fBno_install_plugin\fR (\fBBUNDLE_NO_INSTALL_PLUGIN\fR)
+Whether Bundler should skip installing RubyGems plugins during installation\. When set, plugin files are not written to the plugins directory\. To install plugins later, run \fBgem pristine <gem> \-\-only\-plugins\fR\.
+.TP
 \fBno_prune\fR (\fBBUNDLE_NO_PRUNE\fR)
 Whether Bundler should leave outdated gems unpruned when caching\.
 .TP

bundler/lib/bundler/man/bundle-config.1.ronn

@@ -200,8 +200,16 @@ learn more about their operation in [bundle install(1)](bundle-install.1.html).
    Gemfile to disable lockfile creation entirely (see gemfile(5)).
 * `lockfile_checksums` (`BUNDLE_LOCKFILE_CHECKSUMS`):
    Whether Bundler should include a checksums section in new lockfiles, to protect from compromised gem sources. Defaults to true.
+* `no_build_extension` (`BUNDLE_NO_BUILD_EXTENSION`):
+   Whether Bundler should skip building native extensions during installation.
+   When set, gems are installed without compiling their C extensions.
+   To build extensions later, run `gem pristine <gem> --extensions`.
 * `no_install` (`BUNDLE_NO_INSTALL`):
    Whether `bundle package` should skip installing gems.
+* `no_install_plugin` (`BUNDLE_NO_INSTALL_PLUGIN`):
+   Whether Bundler should skip installing RubyGems plugins during installation.
+   When set, plugin files are not written to the plugins directory.
+   To install plugins later, run `gem pristine <gem> --only-plugins`.
 * `no_prune` (`BUNDLE_NO_PRUNE`):
    Whether Bundler should leave outdated gems unpruned when caching.
 * `only` (`BUNDLE_ONLY`):