php.packages: Fix and clean up external extensions
php.packages: Fix and clean up external extensions

Fix extensions that were broken by the extension refactoring and
remove pthreads and pinba, which had asserts which broke evaluation,
were in need of refactoring and of dubious value.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs