openvpn: bump to version 2.3.0

Toolchain IPv6 support isn't optional any more.
New PolarSSL backend besides the usual OpenSSL one.
New small binary option, reduces binary file size ~100 KiB depending on
target architecture.
Removed no crypto option - it still requires some SSL library headers
and it's pointless anyway, after all we're talking about a VPN solution
here.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
openvpn: fix init script name

Our default (busybox) rc.S implementation requires init scripts to be
named S??*, so rename the openvpn one to S60openvpn (E.G. after network).

At the same time remove the deprecated check-if-custom-skeleton-provided-file
and just always install the init script. People can always fixup/remove
it in their post-build script if needed.

Also name the init script source the same as the destination file name in
TARGET_DIR for consistency.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
tslib: fix license info

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
opkg: fix configure step by adding host-pkgconf dependency

The opkg configure.ac uses the PKG_CHECK_MODULES() m4 macro, which is
provided by the .m4 files installed by host-pkgconf, so we must have
this package as a dependency.

Fixes:

  http://autobuild.buildroot.org/results/069fcab6e7dd5a1f07251ba6f52f65643a2f7594/build-end.log

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Merge branch 'master' of git://git.buildroot.net/buildroot