Use POSIX-compliant read

Rewrite #520.
Using `read var?'prompt'` is wrong. It is ksh (and zsh) specific.
Using `read -p 'prompt' var` is also wrong. It is bash specific.
Since we cannot assume which sh is implemented,
we should write POSIX-compliant code.

Add kalli.st to domains.csv

Update domains.csv

Update domains.csv

* added anu.edu.au

* found/fixed an out-of-place domain

Add Jagiellonian University student email.

added settings for Czech mail provider seznam.cz and a faculty e-mail for Faculty of Electrical Engineering and Communication, Brno University of Technology

Co-authored-by: Aisha Tammy <aisha@aisha.cc>

Co-authored-by: Luke Smith <luke@lukesmith.xyz>

Today's mutt-wizard does not support the XDG Base Directory specifications (https://wiki.archlinux.org/index.php/XDG_Base_Directory) because it says the user should be able to change the config, cache, data folders etc. using the environmental variables XDG_CONFIG_HOME, XDG_CACHE_HOME, and XDG_DATA_HOME, and instead hard codes the default paths ~/.config, ~/.cache, and ~/.local/share. My commit corrects this.

-E option is cross platform and interprets
pattern as regular expression always

Co-authored-by: Aisha Tammy <aisha@aisha.cc>

Allow audio to also be listened to from an email. Did not include setsid because then there would be no way to pause.

Co-authored-by: cl1pp0 <cl1pp0>

Added Australian ISP Bigpond.

* changed ping address to a more friendly location 

`1.1.1.1` is not a friendly address for users from some parts of the world (e.g., China). Changed to `example.org` which should be more friendly to access.

* changed internet check by fallback

This is probably better since for most people it does the same thing and the first back up is Cloudfare's other DNS address which surprisingly can be accessed in more places (e.g., China) now. And changed the finall fallback as example.org.