Add nixnet.email

Add nixnet.email domains to domains.csv

extend list to also work for symlinked accounts

fix macro for sync all accounts

the macro for sync all accounts uses 'mbsync -a' command, which
failed to run for users who have moved their ~/.mbsyncrc somewhere
else.

we should use mw -Y instead, which can detect the MBSYNCRC env

Added e.email service

add mail server setting for Zhejiang University

Fix typo

Fix typo.

Fixed a typo in successful logon message

It was a bit confusing when it said "use `w -y user@example.com` to sync your mail"

Update domains.csv

Add qq,126,163 mail for Chinese users

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.