1.15 [KK 2006-10-23] Speedup in the handling of chunked HTTP message
     transfer. Furthermore, chunked messages are treated as
     single-shot actions (see RFC2616, liberally explained by yours
     truly).
     [KK 2006-11-01] Bison- and flex-generated files are no longer
     removed in 'make clean'. This helps folks who want to build
     Crossroads but don't have these tools.
     Version 1.15 marked as 'stable'.