Document: update how_to_create_pull and adapter_gflags

docs/howto/how_to_create_a_pull.md

@@ -14,13 +14,15 @@ git config user.email "XXX@[XXX.com]"
 - Clone your fork (Please replace "USERNAME" with your GitHub user name.)
 
 ```
-git clone [email protected]:USERNAME/apollo.git
+(Use SSH) git clone [email protected]:USERNAME/apollo.git
+(Use HTTPS) git clone https://github.com/USERNAME/apollo.git
 ```
 
 - Add Apollo repository as upstream
 
 ```
-git remote add upstream [email protected]:ApolloAuto/apollo.git
+(Use SSH) git remote add upstream [email protected]:ApolloAuto/apollo.git
+(Use HTTPS) git remote add upstream https://github.com/ApolloAuto/apollo.git
 ```
 
 - Create a new branch, make changes and commit.

modules/common/adapters/adapter_gflags.cc

@@ -64,7 +64,7 @@ DEFINE_string(mobileye_topic, "/apollo/sensor/mobileye", "mobileye topic name");
 DEFINE_string(delphi_esr_topic, "/apollo/sensor/delphi_esr",
               "delphi esr radar topic name");
 DEFINE_string(conti_radar_topic, "/apollo/sensor/conti_radar",
-              "delphi esr radar topic name");
+              "continental radar topic name");
 DEFINE_string(ultrasonic_radar_topic, "/apollo/sensor/ultrasonic_radar",
               "ultrasonic esr radar topic name");
 // TODO(Authors): Change the topic name