show POP3S, IMAPS and SMTPS as protocols if SSL is enabled

configure.ac

@@ -2559,12 +2559,21 @@ if test "x$CURL_DISABLE_TFTP" != "x1"; then
 fi
 if test "x$CURL_DISABLE_POP3" != "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3"
+  if test "x$SSL_ENABLED" = "x1"; then
+    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3S"
+  fi
 fi
 if test "x$CURL_DISABLE_IMAP" != "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS IMAP"
+  if test "x$SSL_ENABLED" = "x1"; then
+    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS IMAPS"
+  fi
 fi
 if test "x$CURL_DISABLE_SMTP" != "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMTP"
+  if test "x$SSL_ENABLED" = "x1"; then
+    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMTPS"
+  fi
 fi
 if test "x$USE_LIBSSH2" = "x1"; then
   SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"