Merge pull request #1633 from vyos/mergify/bp/sagitta/pr-1632

T7397: add "system kernel option quiet" to suppress boot messages (backport #1632)

Author: c-po

docs/configuration/system/option.rst

@@ -72,6 +72,11 @@ Kernel
 
     .. seealso:: https://docs.kernel.org/admin-guide/pm/amd-pstate.html
 
+.. cfgcmd:: set system option kernel quiet
+
+    Suppress most kernel messages during boot. This is useful for systems with
+    embedded serial console interfaces to speed up the boot process.
+
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