Backoff when limit switch is hit

Thanks phillc54 for the link - I will work myself thru this.
When working in the wood-shop I was not able to load those doc-pages, so thought they were offline. But now from the living-area WLNA I cann access it - seem a network issue in the shop.

After homing use the "Touch Off" button to set the work coordinates.

linuxcnc.org/docs/2.8/html/gui/axis.html#cha:axis-gui