make.sh: Forward the proxy configuration to the chroot shell

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

make.sh

@@ -535,12 +535,19 @@ prepareenv() {
 }
 
 entershell() {
+	local environ=(
+		# HTTP(S) Proxy
+		"https_proxy=${https_proxy}"
+		"http_proxy=${http_proxy}"
+	)
+
 	echo "Entering to a shell inside the build environment, go out with exit"
 
 	local PS1="ipfire build chroot (${BUILD_ARCH}) \u:\w\$ "
 
 	# Run an interactive shell
-	execute --chroot --interactive --network bash -i
+	execute --chroot --interactive --network \
+		"${environ[@]}" bash -i
 }
 
 lfsmakecommoncheck() {