Fix possible problem in find-all-symbols: the symbols possibly don't have a home package if they exist in other packages.
Moved package tests to files following the naming conventions used elsewhere. Added some missing tests.
Modify correctable error tests so that if a continue restart is available, we first try to invoke it.
Relaxed continuable error tests, since the standard does not require them to be continuable with the continue restart.
of the test suite (this file is incomplete). More TODOs. Added more two-way-stream tests.