Updates downloaders: f59ad63 Fix: postfixadmin-dl: major update and fixes (1)

diff --git a/downloaders b/downloaders
index 74b5c9e5dc32a1a12964cbc62f529ada31a4a41b..f59ad63ec47b82282dffe5237542a66a69f0db5e 160000 (submodule)
--- a/downloaders
+++ b/downloaders
@@ -1 +1 @@
-Subproject commit 74b5c9e5dc32a1a12964cbc62f529ada31a4a41b
+Subproject commit f59ad63ec47b82282dffe5237542a66a69f0db5e