Comment 1 for bug 2033518

The current upstream master approach seems to work (tested in schroot):

```
$ cat user-env.sh
#!/bin/bash -i
unset HISTFILE
#/bin/bash -l -c "/usr/bin/python3 -c 'import os; print(dict(os.environ))'"
/bin/bash -l -c env | grep PATH
$ ./user-env.sh
PATH=/usr/local/bin:/usr/bin:/bin
```