spelling: Fix unittest/* issues.

Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

unittest/private.c

@@ -787,7 +787,7 @@ END_TEST
 
 START_TEST(test_is_valid_uri)
 {
-	/* is_valid_uri is superseeded by get_uri_type */
+	/* is_valid_uri is superseded by get_uri_type */
 	ck_assert_int_eq(2, get_uri_type("/api"));
 	ck_assert_int_eq(2, get_uri_type("/api/"));
 	ck_assert_int_eq(2,

unittest/public_func.c

@@ -391,7 +391,7 @@ START_TEST(test_mg_get_var)
 	ck_assert_int_eq(ret, 10);
 	ck_assert_str_eq("this is it", buf);
 
-	/* longer value in the middle of a longer string - seccond occurrence of key
+	/* longer value in the middle of a longer string - second occurrence of key
 	 */
 	memset(buf, 77, sizeof(buf));
 	ret =

unittest/public_server.c

@@ -1141,7 +1141,7 @@ websock_server_data(struct mg_connection *conn,
 	}
 	mark_point();
 
-	return 1; /* return 1 to keep the connetion open */
+	return 1; /* return 1 to keep the connection open */
 }
 
 
@@ -4995,8 +4995,8 @@ START_TEST(test_minimal_http_server_callback)
 	/* Call a test client */
 	minimal_http_client_check("127.0.0.1",
 	                          8080,
-	                          "/8?Altenative=Response",
-	                          "Altenative=Response");
+	                          "/8?Alternative=Response",
+	                          "Alternative=Response");
 
 	/* Run the server for 5 seconds */
 	test_sleep(5);
@@ -5103,8 +5103,8 @@ START_TEST(test_minimal_https_server_callback)
 	/* Call a test client */
 	minimal_https_client_check("127.0.0.1",
 	                           8443,
-	                           "/8?Altenative=Response",
-	                           "Altenative=Response");
+	                           "/8?Alternative=Response",
+	                           "Alternative=Response");
 
 	/* Run the server for 5 seconds */
 	test_sleep(5);