Added ignore ssh knownhosts to upgrade script

CHANGELOG.md

@@ -11,6 +11,7 @@ CHANGELOG
 README: FreeBSD execution needs mailer (not found), sudo missing, bash needed, sed missing (see if StripQuotes mandatory)
 
 ! XX Mar 2016: obackup v2.0 released
+- Added an option to ignore knownhosts for ssh connections (use with caution, this can lead to a security issue)
 - Improved mail fallback
 - More logging enhancements
 - Improved upgrade script

upgrade-v1.x-2.x.sh

@@ -6,7 +6,7 @@ AUTHOR="(L) 2015 by Orsiris \"Ozy\" de Jong"
 CONTACT="http://www.netpower.fr/obacup - ozy@netpower.fr"
 OLD_PROGRAM_VERSION="v1.x"
 NEW_PROGRAM_VERSION="v2.x"
-PROGRAM_BUILD=2016021102
+PROGRAM_BUILD=2016032501
 
 function Usage {
 	echo "$PROGRAM $PROGRAM_BUILD"
@@ -117,6 +117,10 @@ function RewriteConfigFiles {
 		sed -i '/^SSH_COMPRESSION=*/a RSYNC_REMOTE_PATH=' "$config_file"
 	fi
 
+	if ! grep "^SSH_IGNORE_KNOWN_HOSTS=" "$config_file" > /dev/null; then
+		sed -i '/^SSH_COMPRESSION=*/a SSH_IGNORE_KNOWN_HOSTS=no' "$config_file"
+	fi
+
 	if ! grep "^REMOTE_HOST_PING=" "$config_file" > /dev/null; then
 		sed -i '/^RSYNC_REMOTE_PATH=*/a REMOTE_HOST_PING=yes' "$config_file"
 	fi