Adds uppercase versions of env variables to proxy-on command

shells/shared/functions

@@ -114,9 +114,13 @@ function proxy_on() {
 		fi
 		local proxy=$1
 		export http_proxy="$proxy" \
-			https_proxy=$proxy \
+			HTTP_PROXY="$proxy" \
-			ftp_proxy=$proxy \
+			https_proxy="$proxy" \
-			rsync_proxy=$proxy
+			HTTPS_PROXY="$proxy" \
+			ftp_proxy="$proxy" \
+			FTP_PROXY="$proxy" \
+			rsync_proxy="$proxy" \
+			RSYNC_PROXY="$proxy"
 					echo "Proxy environment variable set."
 					return 0
 	fi