Add IS_ISSOCK() or S_ISLNK() macros for Rock-Ridge when environment
doesn't have it, e.g. MSYS 1.0.10 with MinGW 3.4.2.
Go over --enable settings. --disable-cpp-progs now works.
Require libcddb 1.0.1 or better
ridge.
{cd,iso}-info.c util.{c,h}: put common printing routine in util.c
rock.h: add enum for NM flags
iso9660.h: move mode_t typedef so it can be used in rock.h
xa.{c,h}: small typos.
test/*: in most cases better output. On VCD's however there there is a
slight regression on displaying the filename someitmes. Will be
addressed later.
