Remove unneccessary output from php process

[SystemKeeper]

☑️ Resolves

• Removes unneccessary output of "Accepted" and "Closed" messages from the PHP dev server.
• Fixes the trap. Since we can have only one trap per signal, this is now combined.

🖼️ Screenshots

🏚️ Before	🏡 After

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not required
• 📘 API documentation in docs/ has been updated or is not required
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required
• 🔖 Capability is added or not needed

[SystemKeeper]

Done as discussed. In the conversation test we are now down from approx. 18000 to 8000 lines.