Stop logging the build_base NW_HPATH component buffer as a raw C string.
The path buffer is length-prefixed and not NUL-terminated. Printing it with %s
can over-read into following packet or process memory and pollute unrelated
client/test output, for example ZIP output appearing inside MAPDEBUG lines.
Use the safe NW_HPATH component formatter for the build_base ENTER log line as
well as individual component debug output.
No protocol behavior change.
98630eede8