Remove "reserved" elements from struct initializtion.
change 'osr' -> 'rost'
change 'ost' -> 'rost'
rename osr_config.h.in -> rost_config.h.in
Sanitize CFLAGS handling, allowing to pass flags from configure.
Make configure fail on missing dependencies.
Remove "reserved" elements from struct initialization.
Merge branch 'autotools', which sanitizes CFLAGS and makes configure bail out on missing dependencies.