attr: Do not enforce maximum length for NLA_FLAG attributes
attr: Do not enforce maximum length for NLA_FLAG attributes

Although wasteful, NLA_FLAG with non zero payload cause no harm
and should thus not be rejected.

Signed-off-by: Thomas Graf <17c2d8920621522552b392f72d8fdb4d1e866b44@suug.ch>

karlhiramoto/libnl,teto/libnl_old,karlhiramoto/libnl,UnicronNL/libnl3,karlhiramoto/libnl,dsahern/libnl,dsahern/libnl,Distrotech/libnl,cyclops8456/libnl3,mshirley/libnl,chitranshi/libnl,dsahern/libnl,baloo/libnl,thom311/libnl,teto/libnl_old,chitranshi/libnl,congwang/libnl,cyclops8456/libnl3,houstar/libnl,tklauser/libnl,vyos/libnl3,houstar/libnl,cyclops8456/libnl3,tklauser/libnl,houstar/libnl,congwang/libnl,tgraf/libnl,Distrotech/libnl,HolyShitMan/libnl-1,mshirley/libnl,thom311/libnl,cyclops8456/libnl3,tklauser/libnl,karlhiramoto/libnl,claudelee/libnl,dsahern/libnl,HolyShitMan/libnl-1,HolyShitMan/libnl-1,teto/libnl_old,tgraf/libnl,cfriedt/libnl,vyos/libnl3,honsys/libnl,kolyshkin/libnl,kolyshkin/libnl,Distrotech/libnl,houstar/libnl,Distrotech/libnl,thom311/libnl,tgraf/libnl,HolyShitMan/libnl-1,greearb/libnl-ct,mshirley/libnl,honsys/libnl,vyos/libnl3,kolyshkin/libnl,claudelee/libnl,teto/libnl_old,baloo/libnl,baloo/libnl,UnicronNL/libnl3,cfriedt/libnl,kolyshkin/libnl,honsys/libnl,claudelee/libnl,tgraf/libnl,vyos/libnl3,congwang/libnl,congwang/libnl,honsys/libnl,cfriedt/libnl,baloo/libnl,cfriedt/libnl,chitranshi/libnl,mshirley/libnl,greearb/libnl-ct,UnicronNL/libnl3,tklauser/libnl,UnicronNL/libnl3,claudelee/libnl,chitranshi/libnl,greearb/libnl-ct