FS.rename: remove requirment that src and dst be in the same dir

Most filesystem seem to support moving between different directories, and it's
really inconvenient to have to break out os.rename() to achieve this.

fs/expose/fuse/__init__.py

@@ -276,13 +276,9 @@ class FSOperations(Operations):
     def rename(self,old,new):
         old = old.decode(NATIVE_ENCODING)
         new = new.decode(NATIVE_ENCODING)
-        if issamedir(old,new):
         try:
             self.fs.rename(old,new)
-            except ResourceInvalidError:
-                 pass
-            else:
-                return None
+        except FSError:
             if self.fs.isdir(old):
                 self.fs.movedir(old,new)
             else:

fs/memoryfs.py

@@ -388,9 +388,6 @@ class MemoryFS(FS):
 
     @synchronize
     def rename(self, src, dst):
-        if not issamedir(src, dst):
-            raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
-
         dst = pathsplit(dst)[-1]
 
         dir_entry = self._get_dir_entry(src)

fs/mountfs.py

@@ -200,8 +200,6 @@ class MountFS(FS):
 
     @synchronize
     def rename(self, src, dst):
-        if not issamedir(src, dst):
-            raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
         fs1, mount_path1, delegate_path1 = self._delegate(src)
         fs2, mount_path2, delegate_path2 = self._delegate(dst)
 

fs/multifs.py

@@ -158,8 +158,6 @@ class MultiFS(FS):
 
     @synchronize
     def rename(self, src, dst):
-        if not issamedir(src, dst):
-            raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
         for fs in self:
             if fs.exists(src):
                 fs.rename(src, dst)

fs/osfs.py

@@ -140,8 +140,6 @@ class OSFS(FS):
 
     @convert_os_errors
     def rename(self, src, dst):
-        if not issamedir(src, dst):
-            raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
         path_src = self.getsyspath(src)
         path_dst = self.getsyspath(dst)
         os.rename(path_src, path_dst)

fs/s3fs.py

@@ -394,8 +394,6 @@ class S3FS(FS):
         
     def rename(self,src,dst):
         """Rename the file at 'src' to 'dst'."""
-        if not issamedir(src,dst):
-            raise ValueError("Destination path must be in the same directory (use the 'move' method for moving to a different directory)")
         # Actually, in S3 'rename' is exactly the same as 'move'
         self.move(src,dst)
 

fs/sftpfs.py

@@ -251,8 +251,6 @@ class SFTPFS(FS):
 
     @convert_os_errors
     def rename(self,src,dst):
-        if not issamedir(src, dst):
-            raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
         nsrc = self._normpath(src)
         ndst = self._normpath(dst)
         try: