install_update_dovecot.sh: add support for dovecot versions 2.3.x . Fix minor errors. Add mire default values.

conf/install_update_dovecot.conf.sample

@@ -8,8 +8,15 @@
 # --- Configure Settings for your Server here..
 # ---
 
+
+# ---
+# - Base Configuration
+# ---
+
 # - Set update=false if that is a new installation
 # -
+# - This parameter must be set here! There is no default value.
+# -
 _update=false
 
 
@@ -17,11 +24,13 @@ _update=false
 # -
 # - Defaults to 'true' if systemd is present, otherwise to 'false'
 # -
-systemd_support=""
+#systemd_support=""
 
 
 # - postmaster_address
 # -
+# - This parameter must be set here! There is no default value.
+# -
 # - Example:
 # -    postmaster_address="admin\@warenform.net"
 # -
@@ -30,6 +39,8 @@ postmaster_address=""
 
 # - hostname
 # -
+# - This parameter must be set here! There is no default value.
+# -
 hostname=""
 
 
@@ -39,8 +50,10 @@ ipv4=""
 ipv6=""
 
 
+# ---
 # - Listener configuration
-# -
+# ---
+
 imap_listener_adresses="127.0.0.1 $ipv4 $ipv6"
 imaps_listener_adresses="$ipv4 $ipv6"
 
@@ -51,20 +64,45 @@ xmpp_listener=false
 xmpp_listener_address="127.0.0.1"
 xmpp_listener_port="4444"
 
-
+# ---
 # - Database settings
+# ---
+
+# - database
+# -
+# - This parameter must be set here! There is no default value.
 # -
 # - Possible values for parameter database are only  'mysql' and 'postgres'
 # -
-# - 
-database=postgres
-#database=mysql
+database=""
 
-dbname=postfix
-dbuser=postfix
+# - dbname
+# -
+# - Defaults to 'postfix'
+#dbname=postfx
+
+# - dbuser
+# -
+# - Defaults to 'postfix'
+# -
+#dbuser=postfix
+
+# - dbpassword
+# -
+# - This parameter must be set here!
+# -
 dbpassword=""
-dbhost=/var/run/postgresql
 
+# - dbhost
+# -
+# - Defaults to:
+# -    '/var/run/postgresql'  if database is set to 'postgres'
+# -    '127.0.0.1'            if database is set to 'mysql'
+# -
+dbhost=""
+
+# - default_pass_scheme
+# -
 # - Password databases have a default password scheme.
 # -
 # - The password scheme can be overridden for each password by prefixing 
@@ -72,14 +110,19 @@ dbhost=/var/run/postgresql
 # -
 # - See: https://wiki.dovecot.org/Authentication/PasswordSchemes
 # -
-default_pass_scheme=PLAIN
-
-
-# - Cert/Key configurations
+# - Defaults to 'PLAIN'
 # -
+#default_pass_scheme=
+
+
+# ---
+# - Cert/Key configurations
+# ---
+
 cert_base_dir="/etc/postfix/ssl"
 server_cert=${cert_base_dir}/mailserver.crt
 server_key=${cert_base_dir}/mailserver.key
+dh_pem_file="${cert_base_dir}/dh_4096.pem"
 
 imap_cert=${cert_base_dir}/mailserver.crt
 imap_key=${cert_base_dir}/mailserver.key