Commit 1cf34c8

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Add menu for Nano with Optiboot bootloader

Since we are now factory flashing obtiboot, 115200 is the new default upload speed. Adding a new entry to CPU menu is more explicit than adding an "upload speed" menu, and the bootloader path can be updated too. Fixes https://github.com/arduino/Arduino/issues/4492

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hardware/arduino/avr
- boards.txt

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+17

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`‎hardware/arduino/avr/boards.txt`

Lines changed: 17 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -144,15 +144,30 @@ nano.menu.cpu.atmega328=ATmega328P`
`144`	`144`
`145`	`145`	`nano.menu.cpu.atmega328.upload.maximum_size=30720`
`146`	`146`	`nano.menu.cpu.atmega328.upload.maximum_data_size=2048`
`147`		`-nano.menu.cpu.atmega328.upload.speed=57600`
	`147`	`+nano.menu.cpu.atmega328.upload.speed=115200`
`148`	`148`
`149`	`149`	`nano.menu.cpu.atmega328.bootloader.low_fuses=0xFF`
`150`	`150`	`nano.menu.cpu.atmega328.bootloader.high_fuses=0xDA`
`151`	`151`	`nano.menu.cpu.atmega328.bootloader.extended_fuses=0xFD`
`152`		`-nano.menu.cpu.atmega328.bootloader.file=atmega/ATmegaBOOT_168_atmega328.hex`
	`152`	`+nano.menu.cpu.atmega328.bootloader.file=optiboot/optiboot_atmega328.hex`
`153`	`153`
`154`	`154`	`nano.menu.cpu.atmega328.build.mcu=atmega328p`
`155`	`155`
	`156`	`+## Arduino Nano w/ ATmega328P (old bootloader)`
	`157`	`+## --------------------------`
	`158`	`+nano.menu.cpu.atmega328old=ATmega328P (Old Bootloader)`
	`159`	`+`
	`160`	`+nano.menu.cpu.atmega328old.upload.maximum_size=30720`
	`161`	`+nano.menu.cpu.atmega328old.upload.maximum_data_size=2048`
	`162`	`+nano.menu.cpu.atmega328old.upload.speed=57600`
	`163`	`+`
	`164`	`+nano.menu.cpu.atmega328old.bootloader.low_fuses=0xFF`
	`165`	`+nano.menu.cpu.atmega328old.bootloader.high_fuses=0xDA`
	`166`	`+nano.menu.cpu.atmega328old.bootloader.extended_fuses=0xFD`
	`167`	`+nano.menu.cpu.atmega328old.bootloader.file=atmega/ATmegaBOOT_168_atmega328.hex`
	`168`	`+`
	`169`	`+nano.menu.cpu.atmega328old.build.mcu=atmega328p`
	`170`	`+`
`156`	`171`	`## Arduino Nano w/ ATmega168`
`157`	`172`	`## -------------------------`
`158`	`173`	`nano.menu.cpu.atmega168=ATmega168`

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Commit 1cf34c8

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`‎hardware/arduino/avr/boards.txt`

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