Cleanup of debugging flags, SSL

I have cleaned up the SSL -is mess.  Flag is no -l, with check that if
they use -l, they also must use -i or they get an error message on
startup.

I fixed some -d debug handling that was broken in  postmaster and
postgres programs.

Another PERL variable name fix.

Documentation updates.

--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026