due to careful design. We've not yet figured out how to properly
annotate the sockaddr structs to communicate this to the compiler and
there's a number of constructs in the tree that make this annotation
challenging.
As such, reduce warns to 3 here because this code really isn't warns 6
safe, even if it kinda sorta appears to be on intel (which has no such
alignment restrictions). Warns 4 adds the -Wcast-align warning.
# fixes the mips tinderbox build
b207c9d856