[docs] Add reference to splash cmdline in man page

It referenced rhgb, but not splash.  While rhgb was
there first, most distributions use splash since it's
more logical (among other reasons).

diff --git a/docs/plymouth.8 b/docs/plymouth.8
index e9dd5d8335094d3445acb9475ef5d3a505be9cf0..b1aef2e7e1a4573811f3f94125a15d76a33ccd51 100644 (file)
--- a/docs/plymouth.8
+++ b/docs/plymouth.8
@@ -22,10 +22,11 @@ to the new theme and also performs the necessary regeneration of the initial ram
 prior to the mounting of the root filesystem. The options available to this
 script are explained in the \fBOPTIONS\fP paragraph.
 .PP
-In order for plymouth to be loaded during boot, the option `rhgb' must be provided
-at the kernel command line. Depending on your version of GRUB (1 or 2), this
-involves editing the files menu.lst or grub.cfg in your default grub directory
-or editing a special grub configuration file in /etc, followed by invoking
+In order for plymouth to be loaded during boot, the option `splash'
+(or `rhgb' for backward compatibility with the RHGB boot splash) must be
+provided at the kernel command line. Depending on your version of GRUB
+(1 or 2), this involves editing the files menu.lst or grub.cfg in your default
+grub directory or editing a special grub configuration file in /etc, followed by invoking
 something like `update-grub'.
 .SH OPTIONS
 plymouth-set-default-theme follows the usual GNU command line syntax, with long