[package] tinc: version bump to 1.0.19

[package] tinc: version bump to 1.0.19

With pleasure we announce the release of version 1.0.19. Here is a
summary of the changes:

 * Allow :: notation in IPv6 Subnets.

 * Add support for systemd style socket activation.

 * Allow environment variables to be used for the Name option.

 * Add basic support for SOCKS proxies, HTTP proxies, and proxying through an
   external command.

This version of tinc is compatible with 1.0pre8, 1.0 and later, but not
with earlier version of tinc.

git-svn-id: svn://svn.openwrt.org/openwrt/packages@32560 3c298f89-4303-0410-b956-a3cf2f4a3e73