Remove FR/FX macros

Functions returning by-reference are generally a lost cause, we
won't be able to provide useful information for them.

Remove UNKNOWN_INFO func info entries

There's no need to explicitly list that we don't know anything
about a function -- that's the default state.

Merge branch 'PHP-8.0'

* PHP-8.0:
Remove incorrect func info for array_reduce() and pos()

Merge branch 'PHP-8.0'

* PHP-8.0:
filter_var_array() may return array_of_ref

Merge branch 'PHP-8.0'

* PHP-8.0:
fetch_assoc may return array_key_long

Merge branch 'PHP-8.0'

* PHP-8.0:
Remove assert_options() return value info

Merge branch 'PHP-8.0'

* PHP-8.0:
password_get_info() may return array_of_null

Merge branch 'PHP-8.0'

* PHP-8.0:
getdate() may return array_key_long

Merge branch 'PHP-8.0'

* PHP-8.0:
pg_connect() may return rcn

Fix pgsql func info

Some functions can now return a value with refcount > 1.

Remove unnecessary php.h includes from Zend/

The Zend/ directory really shouldn't be including php headers.
These particular includes are plain unnecessary.

Support prototypes in call graph

Even if we don't know the exact method being called, include it
in the call graph with the is_prototype flag. In particular, we
can still make use of

Support prototypes in call graph

Even if we don't know the exact method being called, include it
in the call graph with the is_prototype flag. In particular, we
can still make use of return types from prototype methods, as
PHP 8 makes LSP violations a hard error.

Most other places are adjusted to skip calls with !is_prototype.
Maybe some of them would be fine, but ignoring them is conservative.

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Merge branch 'PHP-8.0'

* PHP-8.0:
Update func info after password_get_info() change

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the

Move optimizer into core

This only moves the files, adjusts the build system, exports APIs
and does minor fixups to make sure the code builds.

This does not yet try to make the optimizer usable independently
of opcache.

Closes GH-6642.

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