Treat bdl like bsl. Warn about non-existent files.
Treat bdl like bsl.
Warn about non-existent files.

bloomberg/bde_verify,bloomberg/bde_verify,bloomberg/bde_verify,yahiahisham14/bde_verify,bloomberg/bde_verify,seanlth/bde_verify,bloomberg/bde_verify,yahiahisham14/bde_verify,seanlth/bde_verify,yahiahisham14/bde_verify,seanlth/bde_verify,yahiahisham14/bde_verify,seanlth/bde_verify