Update documentation for new initramfs compression.

ChangeLog

@@ -5,6 +5,10 @@
 # Distributed under the GPL v2
 # $Id$
 
+  06 Feb 2012; Robin H. Johnson <robbat2@gentoo.org> doc/genkernel.8.txt,
+  gen_cmdline.sh:
+  Update documentation for new initramfs compression.
+
   06 Feb 2012; Robin H. Johnson <robbat2@gentoo.org> defaults/config.sh,
   gen_cmdline.sh, gen_determineargs.sh, gen_initramfs.sh, genkernel.conf:
   Import customizable compression for initramfs, based on Pentoo development.

doc/genkernel.8.txt

@@ -364,9 +364,14 @@ OUTPUT SETTINGS
 	Builds or does not build the generated initramfs into the kernel instead
 	of keeping it as a separate file.
 
-*--*[*no-*]*compress-initramfs*::
+*--*[*no-*]*compress-initramfs*, *--*[*no-*]*compress-initrd*::
 	Compresses or does not compress the generated initramfs.
 
+*--compress-initramfs-type*=<arg>::
+	Compression type for initramfs (best, xz, lzma, bzip2, gzip, lzop).
+	"Best" causes selection of the best available algorithm that is selected
+	in your kernel configuration.
+
 
 RAMDISK OPTIONS
 ---------------

gen_cmdline.sh

@@ -151,8 +151,11 @@ longusage() {
   echo "	--integrated-initramfs, --no-integrated-initramfs"
   echo "				Include/exclude the generated initramfs in the kernel"
   echo "				instead of keeping it as a separate file"
-  echo "	--compress-initramfs, --no-compress-initramfs"
+  echo "	--compress-initramfs, --no-compress-initramfs,"
+  echo "	--compress-initrd, --no-compress-initrd"
   echo "				Compress or do not compress the generated initramfs"
+  echo "	--compress-initramfs-type=<arg>"
+  echo "				Compression type for initramfs (best, xz, lzma, bzip2, gzip, lzop)"
 }
 
 usage() {