This adds a copyright notice to all C++ files and the README clarifying
the license. (There is no change of the license.) This also removes a
few names explicitly mentioned as copyright holders, instead refering to
the git log which has a full list of all osm2pgsql developers. (There is
also still the AUTHORS file which names the most important developers.)
The only exception is the sprompt.cpp file which was taken from
PostgreSQL and keeps its original license information (and, of course,
the files in contrib).
Changes all uses of boost::format to use the "xxx"_format syntax of the
fmt library. Starting from C++14 this will parse the format strings at
compile time making sure the format string and the arguments fit
together.
This also changes the CMake config so that you can set the C++ version
to compile with by using something like -DCMAKE_CXX_STANDARD=14 . C++11
is still the default.
On travis bionic builds are now using C++14.
