d/post{inst,rm},preinst: Remove code for ancient versions

`postinst`, `postrm` and `preinst` contain code related to adjustments
to be done when upgrading from versions older than 0.7.1, 0.8.13, etc.

This code has not been run for a long time, considering that
old-old-stable (Debian 9, 2017) shipped with version 0.9.6-2.
It can thus be removed.

debian/fail2ban.lintian-overrides

@@ -1,3 +0,0 @@
-# it is in a comment...
-fail2ban: read-in-maintainer-script [postinst:41]
-

debian/postinst

@@ -16,7 +16,6 @@ set -e
 # for details, see http://www.debian.org/doc/debian-policy/ or
 # the debian-policy package
 #
-preversion=$2
 
 case "$1" in
     configure)
@@ -27,48 +26,7 @@ case "$1" in
        touch $LOG
        chown root:adm ${LOG}* || true
        chmod 640 ${LOG}* || true
-
+    ;;
-       # Note regarding changed configuration file
-       # Note regarding changed configuration file
-		if [ ! -z $preversion ]; then
-			if dpkg --compare-versions $preversion lt 0.7.1-1; then
-			cat <<EOF
-WARNING!
-
-  Fail2ban 0.7 is a complete rewrite of the 0.6 version, and if you
-  customized any of provided configuration or startup files
-  (/etc/default/fail2ban, /etc/fail2ban.conf, /etc/init.d/fail2ban), please
-  read relevant entry in /usr/share/doc/fail2ban/NEWS.Debian.gz.
-
-EOF
-			fi
-			if dpkg --compare-versions $preversion lt 0.5.4-5.14; then
-			cat <<EOF
-WARNING!
-
- Configuration file /etc/fail2ban.conf, failregex configuration
- parameter specifically, were changed in 0.5.4-5 to close reported
- security breach, and in 0.5.4-5.14 to close few other bugs.
-
-updating from <0.5.4-5
- Unless configuration file (or corresponding failregex'es) gets updated,
- security breach is not closed and corresponding warning will be reported
- by the fail2ban (in the log files).
-
-updating from <0.5.4-5.14
- Bugs #329163, #331695 dealing with changed iptables rules
- outside of fail2ban were fixed in 0.5.4-5.14, and require upgrade of the
- configuration file (fwcheck option was introduced) to take full
- advantage of the problem solution (otherwise some problems might
- persist)
-
- Please review the configuration file and make appropriate changes.
-ENJOY!
-
-EOF
-			fi
-		fi
-		;;
 
     abort-upgrade|abort-remove|abort-deconfigure)
 
@@ -80,17 +38,6 @@ EOF
     ;;
 esac
 
-if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/lighttpd-fastcgi.conf /etc/fail2ban/filter.d/suhosin.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/sasl.conf /etc/fail2ban/filter.d/postfix-sasl.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.9.0-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.9.0-1~ -- "$@"
-fi
-
-# dh_installdeb will replace this with shell code automatically
-# generated by other debhelper scripts.
-
 #DEBHELPER#
 
 exit 0

debian/postrm

@@ -36,14 +36,6 @@ case "$1" in
         	;;
 esac
 
-if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/lighttpd-fastcgi.conf /etc/fail2ban/filter.d/suhosin.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/sasl.conf /etc/fail2ban/filter.d/postfix-sasl.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.9.0-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.9.0-1~ -- "$@"
-fi
-
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.
 

debian/preinst

@@ -1,15 +0,0 @@
-#!/bin/sh
-
-set -e
-
-if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/lighttpd-fastcgi.conf /etc/fail2ban/filter.d/suhosin.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/sasl.conf /etc/fail2ban/filter.d/postfix-sasl.conf 0.8.13-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.9.0-1~ -- "$@"
-    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.9.0-1~ -- "$@"
-fi
-
-#DEBHELPER#
-
-exit 0