Remove references to removed KSQO and protocol options from the docs.
Remove references to removed KSQO and protocol options from the docs.

And some other stuff that was only relevant to very old server versions.

Michael Paquier, with some tweaks by me.

gavioto/psqlodbc,gavioto/psqlodbc,gavioto/psqlodbc,hlinnaka/psqlodbc,hlinnaka/psqlodbc,hlinnaka/psqlodbc