doc: Update Doxyfile.in to latest syntax
doc: Update Doxyfile.in to latest syntax

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