Bug#309889: installation-guide: document "--" kernel parameter trick

[Frans Pop]

tags 309889 + pending
tags 345482 + pending
tags 364517 + pending
thanks

Hi Colin,

I've added the following text in the appendix on preseeding.
Does that cover it?

--- appendix/preseed.xml        (revision 36726)
+++ appendix/preseed.xml        (working copy)
@@ -380,6 +380,14 @@
 on the command line. Just pass <userinput>path/to/var=value</userinput>
 for any of the preseed variables listed in the examples.

+</para><para>
+
+A <quote>&ndash;&ndash;</quote> in the boot options has special meaning.
+Kernel parameters that appear after it will be copied into the installed
+bootloader configuration (if supported by the installer for the
+bootloader). Note that the <quote>&ndash;&ndash;</quote> may already be
+present in the default boot parameters.
+
 </para>
 <note><para>

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