Petitboot v1.6.2 & v1.6.3 tagged

[Samuel Mendoza-Jonas]

Petitboot v1.6.2 and v1.6.3 have been tagged:

In v1.6.2:

- Remove misleading help shortcut from nc-subset

- Increase IPMI timeout
On OpenBMC platforms the BMC can take up to 10 seconds to complete an IPMI
response. This increases the Petitboot timeout to accomodate this since we must
obtain responses for requests such as safe mode.

- Add root .gitingore
(Finally)

In v1.6.3:

- Safely handle lost terminal control commands
Lost terminal control sequences can be caught by Petitboot and result in them
being treated as individual key presses, most often resulting in the Petitboot
UI being exited. Recognise, log, and ignore these so they don't interrupt the
user or autoboot.