Fix GH-13978: Fuzzer readme still mentions obsolete --enable-json flag (#13983)

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Add fuzzer for mb_convert_encoding

This uses the php-fuzz-mbstring name, moving the existing fuzzer
to php-fuzz-mbregex.

[skip ci] Document how to quickly check if jit .dasc files transpile, how to test the jit in different architectures. (#7768)

Add fuzzer for tracing jit

Add fuzzer for function JIT

This is a basic fuzzer for the function JIT, which looks for
crashes and sanitizer violations only, and does not try to detect
differing behavior yet.

Don't hardcode used sanitizers in fuzzer

Now that we have generic --enable-address|undefined|memory-sanitizer
options, let the user pick one of these instead of making the fuzzer
ena

Don't hardcode used sanitizers in fuzzer

Now that we have generic --enable-address|undefined|memory-sanitizer
options, let the user pick one of these instead of making the fuzzer
enable one implicitly.

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Generate execute corpus in generate_all.php

And add crypt() to the function blacklist, it can be very slow.

Add unserializehash fuzzer.

Unlike the straight unserialize fuzzer, this runs only on HashContexts,
and it does an update and finalize on the contexts it creates.

Co-authored-by

Add unserializehash fuzzer.

Unlike the straight unserialize fuzzer, this runs only on HashContexts,
and it does an update and finalize on the contexts it creates.

Co-authored-by: Nikita Popov <nikic@php.net>

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Update fuzzer readme

Drop --enable-json flag and make it more obvious that clang needs
to be used.

Change instructions to use oniguruma from git

Some bugs are already fixed there.

[ci skip]

Add instructions for building an instrumented libonig

[ci skip]

Move scripts out of corpus/ directory

Various improvements to fuzzer SAPIs