tmux: Add path to global conf file

Add path to global conf file so sysupgrade picks it up.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

utils/tmux/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=tmux
 PKG_VERSION:=2.7
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/tmux/tmux/releases/download/$(PKG_VERSION)
@@ -38,6 +38,10 @@ define Package/tmux/description
   tmux is a modern, BSD-licensed alternative to GNU screen.
 endef
 
+define Package/tmux/conffiles
+/etc/tmux.conf
+endef
+
 define Package/tmux/install
 	$(INSTALL_DIR) $(1)/usr/bin
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/tmux $(1)/usr/bin/