Make sure all connection paramters are used in call to PQconnectdbParams.

src/interfaces/ecpg/ecpglib/connect.c

src/interfaces/ecpg/test/connect/test5.pgc

src/interfaces/ecpg/test/expected/connect-test1.stderr

src/interfaces/ecpg/test/expected/connect-test5.c

src/interfaces/ecpg/test/expected/connect-test5.stderr