Replace echo -e with printf for portable ANSI banners

dash (Debian's /bin/sh) doesn't support echo's -e flag: it prints "-e"
literally as text before processing the rest of the string's backslash
escapes. Every script's colored banner was affected. printf's escape
handling is POSIX-mandated and behaves identically under dash and bash,
so swap all 90 echo -e calls for printf, appending the trailing \n that
echo used to add implicitly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

bin/email.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 
-echo -e '\033[35m
+printf '\033[35m
     __  ______    ______
    /  |/  /   |  /  _/ /
   / /|_/ / /| |  / // /
  / /  / / ___ |_/ // /___
 /_/  /_/_/  |_/___/_____/
-\033[0m'
-echo -e "\033[35;1mEnable mail sending for php \033[0m"
+\033[0m\n'
+printf "\033[35;1mEnable mail sending for php \033[0m\n"
 
 if [ "$(id -u)" -ne 0 ]; then
   echo "Please run as root"
@@ -29,7 +29,7 @@ fi
 # http://www.sycha.com/lamp-setup-debian-linux-apache-mysql-php#anchor13
 sleep 2
 apt-get --yes install exim4
-echo -e "\033[35;1mConfiguring EXIM4 \033[0m"
+printf "\033[35;1mConfiguring EXIM4 \033[0m\n"
 while [ "$configexim" != "y" ] && [ "$configexim" != "n" ]
 do
   echo -n "Should we configure exim4 ? [y|n] "
@@ -48,7 +48,7 @@ systemctl restart exim4
 
 # dkim spf
 # https://debian-administration.org/article/718/DKIM-signing_outgoing_mail_with_exim4
-echo -e "\033[35;1mConfiguring DKIM \033[0m"
+printf "\033[35;1mConfiguring DKIM \033[0m\n"
 while [ "$installdkim" != "y" ] && [ "$installdkim" != "n" ]
 do
   echo -n "Should we install dkim for exim4 ? [y|n] "