nl: Improve API doc of nl_connect() and nl_close()
nl: Improve API doc of nl_connect() and nl_close()

Signed-off-by: Thomas Graf <17c2d8920621522552b392f72d8fdb4d1e866b44@redhat.com>

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