Skip comments in package lists.

Comments in package lists used to work in live-build 3.x (although
possibly only as a side-effect of some other logic) and being able to
comment package is a useful feature (to explain why some packages are
included and to make it easy to uncomment some lines to add more useful
packages).

functions/packagelists.sh

@@ -107,6 +107,10 @@ Expand_packagelist ()
 					_LB_ENABLED=1
 					;;
 
+				\#*)
+					# Skip comments
+					;;
+
 				*)
 					if [ ${_LB_ENABLED} -eq 1 ]
 					then