When I changed the taint modeling in 19b7ea8d85, that obviously also means that
some of the related locations for alerts will change. So that's why all the
examples needs to be updated.
Besides this, I had to fix a minor problem with having too many alerts. If
running a query agaisnt code like in the example below, there would be 3 alerts,
2 of them originating from the import.
```
from flask import Flask, request
app = Flask(__name__)
@app.route("/route")
def route():
SINK(request.args.get['input'])
```
The 2 import sources where:
- ControlFlowNode for ImportMember
- GSSA Variable request
I removed these from being a RemoteFlowSource, as seen in the diff.
I considered restricting `FlaskRequestSource` so it only extends
`DataFlow::CfgNode` (and make the logic a bit simpler), but I wasn't actually
sure if that was safe to do or not... If you know, please let me know :)
