Fix SCDF cleanup of unused basic block, kept only because of FREE of a loop var

Fixes oss-fuzz #41516

Fix scdf loop var free check for phi vars

The variable may come from a phi node, in which case we should
take the defining block from it.

Fixes oss-fuzz #40453.

Try harder to clean up unreachable loop free block

While we can't drop the loop free, we can drop other instructions
in the same block. We should also indicate that it no longer has

Try harder to clean up unreachable loop free block

While we can't drop the loop free, we can drop other instructions
in the same block. We should also indicate that it no longer has
predecessors.

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Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |

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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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