Subject: [PATCHES] memory leak patches in libpq and psql

A couple of small memory leak patches (detected with Purify) primarily
in libpq.

* Fixed (NULL) border problem in psql (run psql, do \m, then select
  something from a table...row separators will be nulls)
* Fixed memory leak with the abovementioned border not being freed
  properly.
* Fixed memory leak in freePGconn() not freeing conn->port
* Fixed up PQclear() to free parts of PGresult only if these
  parts are not null.
* Fixed a decent memory leak that occured after executing every command
  in psql. PGresult *results was not freed most of the time.

There is still a leak being detected (2 bytes) in readline functions, but
I think this is old readline library. I will install new one and test it.