Array text encoding

Francisco,

I ran the test suite against 7.3.21, and discovered that array text encoding did not work, because the array[] construct was new in 7.4.  So, I re-wrote the array text value encoding code, yet again. What is that, 37 times now?  Now it uses the more universal '{"", ""}' syntax.  The result is that the array tests run cleanly on all final revisions back to 7.3.21.

The different quoting and escaping combinations with plain text encoding will drive a person crazy.

-Glen