All applicable changes from upstream ORBit-0.5.15 have been applied. It now works with newer glibc versions, which don't like getaddrinfo for unix domain sockets too much. Some other small bugs have been fixed. The multithread test programs have been updated and extended.
The header files can now be included from C++ programs. Another bug for very large transmissions has been fixed. ORBit-mt.m4 is now included for your autoconf pleasure.
