Add message to NotSquareException thrown from Avatar

This prevents cryptic messages such as the following, from `user_ldap`:

     Could not set avatar for uid=user,ou=People,dc=example,dc=net, because:

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

Add message to NotPermittedException thrown from Files\Nodes\Folder

Ditto.

Don't use translation macros here as this seems to be pretty low-level
errors that generally get caught and prettified, and I don't want to
unduly clog down the lower layers.

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

fixup! Add message to NotPermittedException thrown from Files\Nodes\Folder

lib/private/Avatar.php

@@ -131,7 +131,7 @@ class Avatar implements IAvatar {
 		}
 
 		if (!($img->height() === $img->width())) {
-			throw new NotSquareException();
+			throw new NotSquareException($this->l->t("Avatar image is not square"));
 		}
 
 		$this->remove();

lib/private/Files/Node/Folder.php

@@ -42,7 +42,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 	 */
 	public function getFullPath($path) {
 		if (!$this->isValidPath($path)) {
-			throw new NotPermittedException();
+			throw new NotPermittedException('Invalid path: ' . $path);
 		}
 		return $this->path . $this->normalizePath($path);
 	}
@@ -152,7 +152,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 			$this->root->emit('\OC\Files', 'postCreate', array($node));
 			return $node;
 		} else {
-			throw new NotPermittedException();
+			throw new NotPermittedException('No create permission for folder ' . $this->getFullPath($path));
 		}
 	}
 
@@ -173,7 +173,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 			$this->root->emit('\OC\Files', 'postCreate', array($node));
 			return $node;
 		} else {
-			throw new NotPermittedException();
+			throw new NotPermittedException('No create permission for path ' . $this->getFullPath($path));
 		}
 	}
 
@@ -321,7 +321,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 			$this->root->emit('\OC\Files', 'postDelete', array($nonExisting));
 			$this->exists = false;
 		} else {
-			throw new NotPermittedException();
+			throw new NotPermittedException('No delete permission for path ' . $this->getFullPath($this->path));
 		}
 	}
 
@@ -343,7 +343,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 			$this->root->emit('\OC\Files', 'postWrite', array($targetNode));
 			return $targetNode;
 		} else {
-			throw new NotPermittedException();
+			throw new NotPermittedException('No permission to copy to path ' . $targetPath);
 		}
 	}
 
@@ -366,7 +366,7 @@ class Folder extends Node implements \OCP\Files\Folder {
 			$this->path = $targetPath;
 			return $targetNode;
 		} else {
-			throw new NotPermittedException();
+			throw new NotPermittedException('No permission to move to path ' . $targetPath);
 		}
 	}