This is an update the fourth of the patches to be split out from the
former 'plperl feature patch 1'.
Changes in this patch:
- Adds plperl.on_trusted_init and plperl.on_untrusted_init GUCs
on_trusted_init is PGC_USERSET, on_untrusted_init is PGC_SUSET
SPI functions are not available when the code is run.
Errors are detected and reported as ereport(ERROR, ...)
Corresponding documentation.
- select_perl_context() state management improved
An error during interpreter initialization will leave
the state (interp_state etc) unchanged.
- The utf8fix code has been greatly simplified.
Tim.
