* Fix check for <linux/if_tun.h>.
* debian/rules: Support dpkg-buildflags.
* Build system: Use -lresolv only if inet_aton is not found otherwise.
* Fix check for <linux/if_tun.h>.
* debian/rules: Support dpkg-buildflags.
* Build system: Use -lresolv only if inet_aton is not found otherwise.