TESTS: checks: add a simple test config for tcp-checks

tcp-check.cfg tests various arrangements of initial tcp-check rules.

tests/tcp-check.cfg

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+global
+	maxconn 500
+	external-check
+	stats socket /tmp/sock1 mode 666 level admin
+
+defaults
+	timeout client 5s
+	timeout server 5s
+	timeout connect 5s
+	mode http
+
+listen stats
+	bind :8888
+	stats uri /
+
+backend tcp9000
+	option tcp-check
+	server srv 127.0.0.1:9000 check inter 1s
+
+backend tcp9001
+	option tcp-check
+	tcp-check comment "this is a comment"
+	server srv 127.0.0.1:9001 check inter 1s
+
+backend tcp9002
+	option tcp-check
+	tcp-check connect port 9002
+	server srv 127.0.0.1:9002 check inter 1s
+
+backend tcp9003
+	option tcp-check
+	tcp-check comment "this is a comment"
+	tcp-check connect port 9003
+	server srv 127.0.0.1:9003 check inter 1s
+
+backend tcp9004
+	option tcp-check
+	tcp-check connect port 9004
+	tcp-check send-binary 474554 # "GET"
+	tcp-check send-binary 202F20 # " / "
+	tcp-check send-binary 485454 # "HTT"
+	tcp-check send-binary 502F31 # "P/1"
+	tcp-check send-binary 2E300D # ".0\r"
+	tcp-check send-binary 0A0D0A # "\n\r\n"
+	tcp-check expect rstring HTTP
+	server srv 127.0.0.1:9004 check inter 1s
+
+backend tcp9005
+	option tcp-check
+	tcp-check connect port 9005 ssl
+	server srv 127.0.0.1:9005 check inter 1s verify none
+
+backend ssh
+	option tcp-check
+	tcp-check connect port 22
+	tcp-check expect rstring SSH
+	tcp-check send "oops, sorry"
+	server blah 127.0.0.1:22 check inter 1s
+
+frontend dummy
+	mode http
+	bind :9000-9005
+