v6.11.0
make yacc usage POSIX compatible
ss: add checks for bc filter support
replace use of term 'Sanity check'
Fix usage of poll.h header
lnstat: Fix deref of null in print_json() function
lnstat: use same version as iproute2
misc: use SPDX
ss: fix libbpf version check for ENABLE_BPF_SKSTORAGE_SUPPORT
ssfilter: fix clang warning about conversion