REGEN: doc and projects
REFACTOR: cleanup some error handling.
FIX: xcode debugging

Suppress exporting DYLD_LIBRARY_PATH when exec cmd.
DOC: regen.
REFACTOR: httpMap and httpSetFilename.

    Move validation into httpSetFilename.
    Change bool arg to flags: HTTP_TX_NO_CHECK, HTTP_TX_NO_MAP
    Expand doc