* PHP-5.6:
  put missing prototype and fix ts build

* PHP-5.6:
  Fixed bug #72759 Regression in pgo_pgsql

This is caused by the fix for #72633. Namely, lastval() throws an error,
if no nextval() was called earlier in the same session. This is by all
means correct so far, however inside a transaction it leads to an abort.
This is the opposite to MySQL's last_insert_id() which doesn't produce
any error no matter something were autoincremented or not.

To avoid existing scripts breakage in the stable branches, the previous
patch is extended to revert the transaction to the state before the lastval()
call in case of error. It is done only for 5.6 and 7.0 to retain BC. For 7.1+,
the clean behavior should persist. This is already the current behavior, when
the sequence name is explicitly passed. So there's no reason to obfuscate the
errors where this breakage is valid.

* 'bug72788' of https://github.com/keyurdg/php-src:
  Remove typo'd commit
  Fix bug 72788: Invalid memory access when database_object_handle is undefined. Also fix memory leak in dbh_free when using persistent PDO connections.

is undefined. Also fix memory leak in dbh_free when using persistent
PDO connections.

* PHP-5.6:
  Clean up FR #72633