<dec f='src/src/sys/netinet/tcp_var.h' l='976' type='void tcp_sack_init()'/>
<def f='src/src/sys/netinet/tcp_sack.c' l='166' ll='172' type='void tcp_sack_init()'/>
<use f='src/src/sys/netinet/tcp_subr.c' l='419' u='c' c='do_tcpinit'/>
