Merge pull request #1527 in SNORT/snort3 from ~RUCOMBS/snort3:yapp to master

Merge pull request #1527 in SNORT/snort3 from ~RUCOMBS/snort3:yapp to master

Squashed commit of the following:

commit 90aa0b535a627830d720a62059900d432527fdb5
Author: russ <rucombs@cisco.com>
Date:   Sun Mar 3 15:42:12 2019 -0500

    ips_context: minimize iterations to clear data

commit e8ca4969e34c8c5144e805369217cb3ae721d0da
Author: russ <rucombs@cisco.com>
Date:   Sun Mar 3 12:11:20 2019 -0500

    rules: do not preallocate actions

commit 8ef5ef5261bdc7792644e62033406857526efe93
Author: russ <rucombs@cisco.com>
Date:   Sat Mar 2 13:03:23 2019 -0500

    stream_tcp: simplify paf init

commit c510c5321ba4f50a5e5dab3f496268791ad7a45f
Author: russ <rucombs@cisco.com>
Date:   Sat Mar 2 11:07:20 2019 -0500

    stream_tcp: remove seglist node cruft

commit f3cae6509281e130609866f52851d9cb86012890
Author: russ <rucombs@cisco.com>
Date:   Sat Mar 2 11:06:51 2019 -0500

    http_inspect: disable reg test assertion until interface with stream_tcp is updated

commit f2a909e15d848c7d6bac091ec17e9d15eaaf1286
Author: russ <rucombs@cisco.com>
Date:   Fri Mar 1 12:26:45 2019 -0500

    stream_tcp: tweak PAF scanning

commit 84c1ca1e052cc31bfd42d443fa864ae98e6bcbe7
Author: russ <rucombs@cisco.com>
Date:   Mon Feb 25 12:49:30 2019 -0500

    stream_tcp: tweak ips mode flushing

commit a957e579cae4ab8bded2b37035d434459c558f7c
Author: russ <rucombs@cisco.com>
Date:   Mon Feb 25 07:37:16 2019 -0500

    stream_tcp: support unidirectional flushing similar to Snort 2

commit faa804399754ea7a31306c1cb2630287166ac195
Author: russ <rucombs@cisco.com>
Date:   Tue Feb 26 17:57:27 2019 -0500

    cd_tcp: some light refactoring

commit 1e353e1a79ef6644d48bb8bc14802579ea3be23b
Author: russ <rucombs@cisco.com>
Date:   Wed Feb 27 19:25:49 2019 -0500

    stream_tcp: disambiguate seglist trace

commit 388c879743562846ed6cb8a306ceb10c2e4d985c
Author: russ <rucombs@cisco.com>
Date:   Wed Feb 27 19:24:31 2019 -0500

    stream_tcp: do not purge partially acked segment

commit 473d2091365777319a72714e5f7e0864bd3c9b94
Author: russ <rucombs@cisco.com>
Date:   Sun Feb 24 22:51:01 2019 -0500

    profile: convert remaining layer 2 or greater profile scopes to the deep, dark underbelly

commit dd80a3393aac3e74496df7f02d9bd09be5746f23
Author: russ <rucombs@cisco.com>
Date:   Sun Feb 24 22:47:53 2019 -0500

    rule eval: ensure leaf children are properly counted