Improve error handling for unterminated /* ... */ comments.

Add undocumented and unsupported facility for inline C source code
in VCL programs.  The syntax is "C{ getpid(); }C" and you are on
your own if you use this.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1301 d4fa192b-c00b-0410-8231-f00ffab90ce4