docs: update cli and README

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

README.md

@@ -158,6 +158,7 @@ Usage:
 Flags:
       --append-to-cmdline string   Extra kernel cmdline arguments to append to the generated one
       --boot-size uint             Size of the boot partition in MB (default 100)
+      --bootloader string          Bootloader to use: syslinux, grub (default "syslinux")
       --force                      Override output qcow2 image
   -h, --help                       help for convert
       --keep-cache                 Keep the images after the build
@@ -313,6 +314,7 @@ Usage:
 Flags:
       --append-to-cmdline string   Extra kernel cmdline arguments to append to the generated one
       --boot-size uint             Size of the boot partition in MB (default 100)
+      --bootloader string          Bootloader to use: syslinux, grub (default "syslinux")
       --build-arg stringArray      Set build-time variables
   -f, --file string                Name of the Dockerfile
       --force                      Override output qcow2 image

docs/content/reference/d2vm_build.md

@@ -11,6 +11,7 @@ d2vm build [context directory] [flags]
 ```
       --append-to-cmdline string   Extra kernel cmdline arguments to append to the generated one
       --boot-size uint             Size of the boot partition in MB (default 100)
+      --bootloader string          Bootloader to use: syslinux, grub (default "syslinux")
       --build-arg stringArray      Set build-time variables
   -f, --file string                Name of the Dockerfile
       --force                      Override output qcow2 image

docs/content/reference/d2vm_convert.md

@@ -11,6 +11,7 @@ d2vm convert [docker image] [flags]
 ```
       --append-to-cmdline string   Extra kernel cmdline arguments to append to the generated one
       --boot-size uint             Size of the boot partition in MB (default 100)
+      --bootloader string          Bootloader to use: syslinux, grub (default "syslinux")
       --force                      Override output qcow2 image
   -h, --help                       help for convert
       --keep-cache                 Keep the images after the build

docs/content/reference/d2vm_run_qemu.md

@@ -9,7 +9,7 @@ d2vm run qemu [options] [image-path] [flags]
 ### Options
 
 ```
-      --accel string            Choose acceleration mode. Use 'tcg' to disable it. (default "hvf:tcg")
+      --accel string            Choose acceleration mode. Use 'tcg' to disable it. (default "kvm:tcg")
       --arch string             Type of architecture to use, e.g. x86_64, aarch64, s390x (default "x86_64")
       --cpus uint               Number of CPUs (default 1)
       --detached                Set qemu container to run in the background