uhttpd: update to latest Git HEAD

5f9ae57 client: fix invalid data access through invalid content-length values

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit f34f9a414d)

package/network/services/uhttpd/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=4
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/uhttpd.git
-PKG_SOURCE_DATE:=2019-08-17
-PKG_SOURCE_VERSION:=6b03f9605323df23d12e3876feb466f53f8d50c4
-PKG_MIRROR_HASH:=4df96054a4fce659e6c849feae7850d542b37ad5caffc1485b7a63c7c2764cb1
+PKG_SOURCE_DATE:=2019-12-22
+PKG_SOURCE_VERSION:=5f9ae5738372aaa3a6be2f0a278933563d3f191a
+PKG_MIRROR_HASH:=16977c2d7e68f6db3241f874df625af9bd3bafa06fe4499ecb3561c825321e5d
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 PKG_LICENSE:=ISC