0.5.17

This is a minor bug-fix release:

• Fix URI parsing for non-std 'space' chars
  [Fixed by Victor Julien / Reported by Darien Huss from Emerging Threats]
• Fixing buffer overrun that was failing clang
  -fsanitize=address checks [Sam Baskinger]
• Replace strcat/sprintf by strlcat/snprintf [Giuseppe Longo]
• Fix autogen on CentOS 5.11 [Victor Julien]
• Fix dereferencing type-punned pointer on CentOS 5.11 [Giuseppe Longo]
• Fix warning on OpenBSD [Giuseppe Longo]