"HL" hoplimit target support

configname: CONFIG_IP6_NF_TARGET_HL

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>The IPv6 protocol
└─>IPv6: Netfilter Configuration
└─>"HL" hoplimit target support
In linux kernel since version 2.6.14 (release Date: 2005-10-27)  
This is a backwards-compatible option for the user's convenience
(e.g. when running oldconfig). It selects
CONFIG_NETFILTER_XT_TARGET_HL.