Build Test Instruction
======================
1. Create `/tmp/pgsql/source' directory and extract the postgresql
source tarball(s) in it.
2. Check `VERSIONS' variable in `tests/build_test.sh'.
3. Run `./test/build_test.sh' (in the xlogdump source root directory).
4. `xlogdump-${VER}' executable(s) must be created.