* Restore PLCC-32 THT socket footprint
This footprint was removed in https://github.com/KiCad/kicad-footprints/pull/675 along with some incorrect footprints. This footprint seems to be correct.
* Fix courtyard size
* Fix courtyard again
* Add datasheet link to footprint description
Drill size and pad width is decreased to enable the placement
of two signal lines between them. Width of signal lines is
8 mil or 0.2032 mm.
drill 0.95 --> drill 0.8
size 1.75 1.75 --> size 1.4224 1.4224