REGTEST: checks: Adapt SSL error message reported when connection is rejected

Depending on the SSL library version, the reported error may differ when the
connection is rejected during the handshake. An empty handshke may be detected
or just an generic handshake error. So tcp-check-ssl.vtc has been adapted to
support both error messages.
diff --git a/reg-tests/checks/tcp-check-ssl.vtc b/reg-tests/checks/tcp-check-ssl.vtc
index e586358..149bf7a 100644
--- a/reg-tests/checks/tcp-check-ssl.vtc
+++ b/reg-tests/checks/tcp-check-ssl.vtc
@@ -32,14 +32,14 @@
     recv
     expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Proxy be3 started."
     recv
-    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be3/srv failed, reason: Layer6 invalid response.+info: \"SSL handshake failure\".+check duration: [[:digit:]]+ms, status: 0/1 DOWN."
+    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be3/srv failed, reason: Layer6 invalid response.+info: \"(Connection closed during SSL handshake|SSL handshake failure)\".+check duration: [[:digit:]]+ms, status: 0/1 DOWN."
 } -start
 
 syslog S4 -level notice {
     recv
     expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Proxy be4 started."
     recv
-    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be4/srv failed, reason: Layer6 invalid response.+info: \"SSL handshake failure at step 1 of tcp-check \\(connect\\)\".+check duration: [[:digit:]]+ms, status: 0/1 DOWN."
+    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be4/srv failed, reason: Layer6 invalid response.+info: \"(Connection closed during SSL handshake|SSL handshake failure) at step 1 of tcp-check \\(connect\\)\".+check duration: [[:digit:]]+ms, status: 0/1 DOWN."
 } -start