Expose rsync's copy_unsafe_links

As per the rsync docs: "This tells rsync to copy the referent of symbolic links that point outside the copied tree. Absolute symlinks are also treated like ordinary files, and so are any symlinks in the source path itself when --relative is used. This option has no additional effect if --copy-links was also specified."

default-rsync.lua

@@ -61,6 +61,7 @@ rsync.checkgauge = {
 		compress          =  true,
 		copy_dirlinks     =  true,
 		copy_links        =  true,
+		copy_unsafe_links =  true,
 		cvs_exclude       =  true,
 		dry_run           =  true,
 		executability     =  true,
@@ -588,6 +589,12 @@ rsync.prepare = function
 		computedN = computedN  + 1
 	end
 
+	if crsync.copy_unsafe_links
+	then
+		computed[ computedN ] = '--copy-unsafe-links'
+		computedN = computedN  + 1
+	end
+
 	if crsync.groupmap
 	then
 		computed[ computedN ] = '--groupmap=' .. crsync.groupmap