Tests: reverted 2f7d7953b2a8 after FreeBSD-EN-19:02.tcp.

h2_headers.t

diff --git a/h2_headers.t b/h2_headers.t
index 185da1b..d407c77 100644
--- a/h2_headers.t
+++ b/h2_headers.t
@@ -644,9 +644,6 @@
 
 # response header frame sent in parts
 
-SKIP: {
-skip 'broken tcp', 5 if $^O eq 'freebsd' and $Config{osvers} =~ '12.0-release';
-
 $s = Test::Nginx::HTTP2->new(port(8082));
 $s->h2_settings(0, 0x5 => 2**17);
 
@@ -684,8 +681,6 @@
 
 }
 
-}
-
 # max_field_size - header field name
 
 $s = Test::Nginx::HTTP2->new(port(8084));