Remove residual blank line at start of MakefileThis is a residual of the $FreeBSD$ removal.MFC After: 3 days (though I'll just run the command on the branches)Sponsored by: Netflix
sys: Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
Add opt_ipsec.h to fix standalone builds after r361633.
sys/modules: normalize .CURDIR-relative paths to SRCTOPThis simplifies make output/logicTested with: `cd sys/modules; make ALL_MODULES=` on amd64MFC after: 1 monthSponsored by: Dell EMC Isilon
Overhaul if_enc(4) and make it loadable in run-time.Use hhook(9) framework to achieve ability of loading and unloadingif_enc(4) kernel module. INET and INET6 code on initialization registerstwo h
Overhaul if_enc(4) and make it loadable in run-time.Use hhook(9) framework to achieve ability of loading and unloadingif_enc(4) kernel module. INET and INET6 code on initialization registerstwo helper hooks points in the kernel. if_enc(4) module uses these helperhook points and registers its hooks. IPSEC code uses these hhook pointsto call helper hooks implemented in if_enc(4).
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