Switch default C++ language level to C++11 on Unix.
- "Modern" C++ (C++11 and later) has become ubiquitous. - We already need C++11 to compile the KWallet plugin. - JavaHL compiles in C++11 mode, otherwise it would not build on Windows with newer versions of MSVC. - Our core code is not affected at all.
* configure.ac: Display the C and C++ language level flags. * build/ac-macros/compiler.m4 (SVN_CXX_MODE_SETUP): Switch to C++11. (SVN_CXX_MODE_SETUP11): Remove; it's now obsolete. * build/ac-macros/kwallet.m4 (SVN_LIB_KWALLET): Remove reference to SVN_CXX_MODE_SETUP11.
* subversion/bindings/javahl/native/RemoteSession.cpp (compare_c_strings::operator()): Make this method const to avoid a warning.