Godot 3.1.1 ignores invalid command line options and continues with execution

[wyattbiker]

Godot version:
v3.1.1.stable.official

OS/device including version:
Mac OS X

Issue description:

1. Godot does not validate command line options. Instead continues executing.
2. Command line option -v does not work. Use --version instead.

Steps to reproduce:
E.g. godot -xyz will run godot anyway.
Also godot -v is ignored. However godot --version works

Expected behavior
Should produce an error message when option is invalid.

[lupoDharkael]

will be fixed by #26213

[Calinou]

Duplicate of #20000.

Also godot -v is ignored. However godot --version works

This is because -v is short for --verbose 🙂 We could have -V as a shorthand for --version.