fix some fs informational problems

module/devfs.lua

@@ -61,6 +61,8 @@ function devfs.component.seek(fd,...)
 end
 function devfs.component.remove(fname)
 end
+devfs.component.address = "devfs"
+devfs.component.type = "devfs"
 
 function devfs.register(fname,fopen) -- Register a new devfs node with the name *fname* that will run the function *fopen* when opened. This function should return a function for read, a function for write, function for close, and optionally, a function for seek, in that order.
  devfs.files[fname] = fopen

module/fs.lua

@@ -111,7 +111,7 @@ function fs.address(path) -- returns the address of the filesystem at a given pa
 end
 function fs.type(path) -- returns the component type of the filesystem at a given path, if applicable
  local fsi,_ = fs.resolve(path)
- return fsmounts[fsi].type
+ return fsmounts[fsi].type or "filesystem"
 end
 
 fsmounts["/"] = component.proxy(computer.tmpAddress())