added rsync options backup, backup_dir and suffix

ChangeLog

@@ -1,15 +1,17 @@
 ??-??-????:
 	enhancement: add rsync options:
 		"append",
-		"append-verify",
+		"append_verify",
+		"backup",
+		"backup_dir",
 		"chmod",
 		"chown",
 		"copy_dirlinks",
 		"existing",
 		"groupmap",
 		"omit_dir_times",
-		"omit_dir_times"
 		"omit_link_times",
+		"suffix,"
 		"usermap",
 	enhancement: settings{ } now checks for unknown entries and errors if so.
 	change: Lsyncd now writes a startup log message before daemonizing

default-rsync.lua

@@ -56,6 +56,8 @@ rsync.checkgauge = {
 		append            =  true,
 		append_verify     =  true,
 		archive           =  true,
+		backup            =  true,
+		backup_dir        =  true,
 		binary            =  true,
 		bwlimit           =  true,
 		checksum          =  true,
@@ -89,6 +91,7 @@ rsync.checkgauge = {
 		rsh               =  true,
 		rsync_path        =  true,
 		sparse            =  true,
+		suffix            =  true,
 		temp_dir          =  true,
 		timeout           =  true,
 		times             =  true,
@@ -425,6 +428,7 @@ rsync.prepare =
 
 	local shortFlags = {
 		acls               = 'A',
+		backup             = 'b',
 		checksum           = 'c',
 		compress           = 'z',
 		copy_dirlinks      = 'k',
@@ -505,6 +509,12 @@ rsync.prepare =
 		computed[ computedN ] = '--append-verify'
 		computedN = computedN  + 1
 	end
+	
+	if crsync.backup_dir
+	then
+		computed[ computedN ] = '--backup-dir=' .. crsync.backup_dir
+		computedN = computedN  + 1
+	end
 
 	if crsync.bwlimit
 	then
@@ -560,6 +570,12 @@ rsync.prepare =
 		computedN = computedN  + 1
 	end
 
+	if crsync.suffix
+	then
+		computed[ computedN ] = '--suffix=' .. crsync.suffix
+		computedN = computedN  + 1
+	end
+
 	if crsync.temp_dir
 	then
 		computed[ computedN ] = '--temp-dir=' .. crsync.temp_dir