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/i386-pc/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
@@ -106,6 +108,7 @@ help: minicmd
 hexdump_random: random
 initrd16: linux16
 initrd: linux
+initrdefi: linux
 keymap: keylayouts
 kfreebsd_loadenv: bsd
 kfreebsd_module: bsd
@@ -122,6 +125,7 @@ legacy_password: legacycfg
 legacy_source: legacycfg
 linux16: linux16
 linux: linux
+linuxefi: linux
 list_trusted: pgp
 loadfont: font
 lsapm: lsapm
@@ -184,6 +188,8 @@ vbeinfo: videoinfo
 vbetest: videotest
 videoinfo: videoinfo
 videotest: videotest
+vt_set_boot_opt: linux
+vt_unset_boot_opt: linux
 write_byte: memrw
 write_dword: memrw
 write_word: memrw

INSTALL/grub/i386-pc/moddep.lst

@@ -96,6 +96,7 @@ bufio:
 usbserial_ftdi: serial usb usbserial_common
 legacy_password_test: functional_test legacycfg
 cpuid: extcmd
+blscfg: extcmd normal
 hdparm: extcmd hexdump
 bfs: fshelp
 gcry_blowfish: crypto