1.0rc1 Release Candidate

This is a bugfix release and a potential 1.0 candidate

Changes from 0.17.2

• Improvements to build process
• includes: Fix format string for C++11
• ipc: Prevent fd and memory leaks in handle_new_connection()
• configure.ac: remove an unused DEFINE
• log: don't call dlopen inside dl_iterate_phdr()
• tests: Allow more time for stress_connections tests
• ipc: Don't send the dispatch_del() function a closed fd
• Fix deletion of sockets on *BSD platforms
• Fix check_ipc tests so they exit correctly
• Add helper script for generating online documentation
• update copy of gitlog-to-changelog to latest GNU version
• Fix: valgrind "invalid file descriptor" warning