Docs: add missing pins, clarify indeterminate descriptions
Docs: add missing pins, clarify indeterminate descriptions

Signed-off-by: John Thornton <601166b5efca3d35ab1942428a84fb6f8bcae6cc@gnipsel.com>

bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,cnc-club/linuxcnc,unseenlaser/machinekit,RunningLight/machinekit,unseenlaser/machinekit,bobvanderlinden/machinekit,cdsteinkuehler/MachineKit,kinsamanka/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,ArcEye/MK-Qt5,narogon/linuxcnc,cdsteinkuehler/linuxcnc,ianmcmahon/linuxcnc-mirror,aschiffler/linuxcnc,ikcalB/linuxcnc-mirror,unseenlaser/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,ArcEye/MK-Qt5,strahlex/machinekit,unseenlaser/linuxcnc,RunningLight/machinekit,mhaberler/machinekit,bmwiedemann/linuxcnc-mirror,narogon/linuxcnc,ikcalB/linuxcnc-mirror,aschiffler/linuxcnc,araisrobo/machinekit,cnc-club/linuxcnc,kinsamanka/machinekit,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,ArcEye/MK-Qt5,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,kinsamanka/machinekit,araisrobo/machinekit,narogon/linuxcnc,unseenlaser/machinekit,ArcEye/machinekit-testing,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,EqAfrica/machinekit,araisrobo/linuxcnc,aschiffler/linuxcnc,araisrobo/linuxcnc,cdsteinkuehler/MachineKit,jaguarcat79/ILC-with-LinuxCNC,bobvanderlinden/machinekit,Cid427/machinekit,mhaberler/machinekit,cdsteinkuehler/linuxcnc,ianmcmahon/linuxcnc-mirror,kinsamanka/machinekit,mhaberler/machinekit,RunningLight/machinekit,araisrobo/linuxcnc,unseenlaser/machinekit,unseenlaser/machinekit,Cid427/machinekit,araisrobo/machinekit,strahlex/machinekit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/linuxcnc,araisrobo/machinekit,bobvanderlinden/machinekit,jaguarcat79/ILC-with-LinuxCNC,ikcalB/linuxcnc-mirror,aschiffler/linuxcnc,RunningLight/machinekit,cdsteinkuehler/linuxcnc,ArcEye/machinekit-testing,cdsteinkuehler/MachineKit,unseenlaser/machinekit,RunningLight/machinekit,EqAfrica/machinekit,Cid427/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/machinekit-testing,ArcEye/machinekit-testing,bobvanderlinden/machinekit,ArcEye/MK-Qt5,unseenlaser/linuxcnc,cnc-club/linuxcnc,mhaberler/machinekit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/linuxcnc,Cid427/machinekit,EqAfrica/machinekit,ArcEye/machinekit-testing,narogon/linuxcnc,narogon/linuxcnc,araisrobo/machinekit,ArcEye/MK-Qt5,araisrobo/linuxcnc,unseenlaser/linuxcnc,kinsamanka/machinekit,ArcEye/MK-Qt5,Cid427/machinekit,cnc-club/linuxcnc,RunningLight/machinekit,araisrobo/machinekit,ArcEye/machinekit-testing,bmwiedemann/linuxcnc-mirror,aschiffler/linuxcnc,bmwiedemann/linuxcnc-mirror,cnc-club/linuxcnc,ikcalB/linuxcnc-mirror,cdsteinkuehler/MachineKit,strahlex/machinekit,RunningLight/machinekit,unseenlaser/machinekit,Cid427/machinekit,RunningLight/machinekit,Cid427/machinekit,EqAfrica/machinekit,mhaberler/machinekit,ArcEye/machinekit-testing,mhaberler/machinekit,strahlex/machinekit,cdsteinkuehler/MachineKit,ianmcmahon/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,araisrobo/machinekit,strahlex/machinekit,mhaberler/machinekit,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,ArcEye/machinekit-testing,cdsteinkuehler/linuxcnc,ikcalB/linuxcnc-mirror,bobvanderlinden/machinekit,EqAfrica/machinekit,strahlex/machinekit,EqAfrica/machinekit,araisrobo/machinekit,ArcEye/MK-Qt5,cnc-club/linuxcnc,araisrobo/machinekit,unseenlaser/linuxcnc,kinsamanka/machinekit