Merge branch 'los844' into 'master'

[LOS-884] Remove deprecated docs for AIMS BIOS lgcy

See merge request !77

docs/installation/aims/aims2lgcyworkaround.md

-# Legacy workaround
-
-Use this workaround ONLY for systems which cannot boot using standard configuration, as of Feb 2016 this concerns following types of network cards: Mellanox Connect X-2, Chelsio T520-LL-CR, QLogic cLOM8215
-
-## Enable PXE workaround
-
-Make sure your aims2 client version is at least 2.11.
-
-Add affected system to AIMS2:
-
-```bash
-# aims2 addhost HOSTNAME
-```
-
-Enable PXE workaround:
-
-```bash
-# aims2 pxelgcyon HOSTNAME
-```
-
-Optional: Set PXE boot target:
-
-```bash
-# aims2 pxeon HOSTNAME TARGET
-```
-
-Wait until AIMS2 reloads dnsmasq configuration, this takes up to 30s.
-
-```bash
-# aims2 showhost HOSTNAME -all
-
-Hostname:           HOSTNAME
-
-Interface HWADDR:   XX-XX-XX-XX-XX-XX
-
-PXE status:         OFF
-
-PXE boot options:   none
-
-PXE boot type:      BIOS
-
-PXE boot target:    none
-
-PXE noexpiry:       N
-
-PXE boot legacy:    Y
-
-Registered by:      jpolok
-
-Registered at:      2016/02/29 07:48:28
-
-Enabled at:         ????/??/?? ??:??:??
-
-Booted at:          ????/??/?? ??:??:??
-
-Disabled at:        ????/??/?? ??:??:??
-```
-
-## Enable PXE workaround - alternative syntax
-
-```bash
-# aims2 addhost --bios --lgcy --hostname HOSTNAME --name TARGET --kickstart=KSFILE [ --kopts=KSOPTS ]
-```
-
-## Enable PXE workaround - ai-installhost
-
-For systems installed using ai-installhost please add `--mode bioslgcy` flag to the command (this is temporary until `ai-installhost` will be able to autodetect affected hardware):
-
-```bash
-# ai-installhost --mode bioslgcy HOSTNAME.cern.ch ...
-```
-
-## Disable PXE workaround
-
-The PXE workaround stays active until one of the following commands is issued:
-
-```bash
-# aims2 pxelgcyoff HOSTNAME
-
-# aims2 pxeon HOSTNAME TARGET uefi
-
-# aims2 delhost HOSTNAME
-
-# aims2 addhost HOSTNAME
-```
-
-Installing the system or using `# aims2 pxeoff HOSTNAME` does **NOT** disable the workaround.
-