Refactor linkfs and netfs resolve functions for improved path handling

sys/modules/opus/fs/netfs.lua

@@ -35,8 +35,10 @@ end
 local methods = { 'delete', 'exists', 'getFreeSpace', 'makeDir', 'list', 'listEx', 'attributes' }
 
 local function resolve(node, dir)
-	-- TODO: Wrong ! (does not support names with dashes)
-	dir = dir:gsub(node.mountPoint, '', 1)
+	local mp = node.mountPoint
+	if dir:sub(1, #mp) == mp then
+		dir = dir:sub(#mp + 1)
+	end
 	return fs.combine(node.source, dir)
 end
 
@@ -53,7 +55,7 @@ end
 
 function netfs.mount(_, id, source)
 	if not id or not tonumber(id) then
-		error('ramfs syntax: computerId [directory]')
+		error('netfs syntax: computerId [directory]')
 	end
 	return {
 		id = tonumber(id),