Changelog:
Allow compilation from a build directory.
Source code cleanups.
Fix some options specified on the command line not surviving a HUP
signal.
Handle tun/tap device returning EPERM or EBUSY.
Disable PMTUDiscovery when TCPOnly is used.
Support the —runstatedir option of the autoconf 2.70.
Port changes:
- "patch-doc_tinc_texi" committed upstream.
- "Using $< in a non-suffix rule context is a GNUmake idiom
(Makefile:840)" enable USE_GMAKE.c
a388f1845e