Add separate login to account creation queries

This is first working version of an added login query to the account
creation process. It fixes the first part of #6, but there still needs
to be more testing for the second part of that issue, which concerns
creating accounts with domains not listed in domain.csv.

autoconf/mutt_profile

@@ -2,7 +2,7 @@
 # muttrc file for account $title
 set realname = "$realname"
 set from = "$fulladdr"
-set smtp_url = "smtp://$fulladdr@$smtp:$sport/"
+set smtp_url = "smtp://$login@$smtp:$sport/"
 set sendmail = "/usr/bin/msmtp -a $title"
 set folder = "~/.mail/$title"
 set header_cache = ~/.config/mutt/accounts/$title/cache/headers