corrections, new terminals and new sub-dir "discontinued"

[plc-user]

• corrected front-view of 750-8215
• added new "distribution-terminals" 2006-803x and 2206-803x
• added directory "discontinued" and sorted some elements to it (would like to keep those elements here because they are still in "heavy use" by end-users although they aren't sold as new anymore)

[scorpio810]

Merged, thanks