`sudo` commands giving error and `allowed_shell_escape` not working as expected

[Shashank-Pandey-ML]

I noticed 2 issues in the latest version of the lshell:

1. Commands prefixed with sudo are giving this message:

admin:~$ sudo ls
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
sudo: a password is required

2. The allowed_shell_escape from the configuration is not working as expected.

[malc0mn]

Just want to confirm this fix works for me concerning allowed_shell_escape. Also fixes issues with login_script where login_script tries to call another script using bash path/to/script.sh.