Convert all php_error_docref0 to php_error_docref

[Girgias]

Splits #4254

Takes the rather straight forward conversion of php_error_docref0() to php_error_docref() and remove the define in php.h

[nikic]

@petk Any data on php_error_docref0 use in extensions?

[petk]

Only two minor ones:

• https://github.com/datastax/php-driver/blob/587c83d68f665a5c32680e583ff3727626b8eff2/ext/src/Cluster/Builder.c#L133
• Swoole
  • https://github.com/swoole/swoole-src/blob/d33e429ccaeb508bc0818a9afeef1d0cc9df7b66/thirdparty/php/sockets/sendrecvmsg.cc#L34
  • https://github.com/swoole/swoole-src/blob/d33e429ccaeb508bc0818a9afeef1d0cc9df7b66/thirdparty/php/sockets/conversions.cc#L123

[Girgias]

Only two minor ones:

* https://github.com/datastax/php-driver/blob/587c83d68f665a5c32680e583ff3727626b8eff2/ext/src/Cluster/Builder.c#L133

* Swoole
  
  * https://github.com/swoole/swoole-src/blob/d33e429ccaeb508bc0818a9afeef1d0cc9df7b66/thirdparty/php/sockets/sendrecvmsg.cc#L34
  * https://github.com/swoole/swoole-src/blob/d33e429ccaeb508bc0818a9afeef1d0cc9df7b66/thirdparty/php/sockets/conversions.cc#L123

I'll make some PRs for those two extensions. Thanks for the info :)

Edit: Done.

[nikic]

Thanks for checking. In that case I think this is okay.

[remicollet]

Notice that this change breaks ABI
(undefined symbol: php_error_docref0)

[petk]

@remicollet -> #4470