BUG/MINOR: quic: fix type bug on "show quic" for 32-bits arch

Incorrect printf format specifier "%lu" was used on "show quic" handler
for uint64_t. This breaks build on 32-bits architecture. To fix this
portability issue, force an explicit cast to unsigned long long with
"%llu" specifier.

This must be backported up to 2.7.
1 file changed