1. Boot menu over serial supported

2. Optimization for booting Solus
3. Optimization for booting .efi file
4. support deepin-live iso
5. support Endless OS
6. framework for booting .img file

INSTALL/grub/x86_64-efi/command.lst

@@ -1,6 +1,8 @@
 *acpi: acpi
 *all_functional_test: functional_test
 *background_image: gfxterm_background
+*bls_import: blscfg
+*blscfg: blscfg
 *cat: cat
 *cpuid: cpuid
 *crc: hashsum
@@ -96,6 +98,7 @@ help: minicmd
 hexdump_random: random
 initrd16: linux16
 initrd: linux
+initrdefi: linux
 keymap: keylayouts
 kfreebsd_loadenv: bsd
 kfreebsd_module: bsd
@@ -112,6 +115,7 @@ legacy_password: legacycfg
 legacy_source: legacycfg
 linux16: linux16
 linux: linux
+linuxefi: linux
 list_trusted: pgp
 loadbios: loadbios
 loadfont: font
@@ -173,6 +177,8 @@ true: true
 usb: usbtest
 videoinfo: videoinfo
 videotest: videotest
+vt_set_boot_opt: linux
+vt_unset_boot_opt: linux
 write_byte: memrw
 write_dword: memrw
 write_word: memrw