Copter: rename verify_must to verify_nav_command

Perhaps easier to understand if we use the "nav" and "conditional"
command labels

ArduCopter/commands_logic.pde

@@ -47,6 +47,7 @@ static void process_nav_command()
 
 }
 
+// process_cond_command - main switch statement to initiate the next conditional command in the command_cond_queue
 static void process_cond_command()
 {
     switch(command_cond_queue.id) {
@@ -72,6 +73,8 @@ static void process_cond_command()
     }
 }
 
+// process_now_command - main switch statement to initiate the next now command in the command_cond_queue
+// now commands are conditional commands that are executed immediately so they do not require a corresponding verify to be run later
 static void process_now_command()
 {
     switch(command_cond_queue.id) {
@@ -136,9 +139,9 @@ static void process_now_command()
 // Verify command Handlers
 /********************************************************************************/
 
-// verify_must - switch statement to ensure the active navigation command is progressing
+// verify_nav_command - switch statement to ensure the active navigation command is progressing
 // returns true once the active navigation command completes successfully
-static bool verify_must()
+static bool verify_nav_command()
 {
     switch(command_nav_queue.id) {
 
@@ -181,9 +184,9 @@ static bool verify_must()
     }
 }
 
-// verify_may - switch statement to ensure the active conditional command is progressing
+// verify_cond_command - switch statement to ensure the active conditional command is progressing
 // returns true once the active conditional command completes successfully
-static bool verify_may()
+static bool verify_cond_command()
 {
     switch(command_cond_queue.id) {
 

ArduCopter/commands_process.pde

@@ -145,7 +145,7 @@ static void execute_nav_command(void)
 static void verify_commands(void)
 {
     // check if navigation command completed
-    if(verify_must()) {
+    if(verify_nav_command()) {
         // clear navigation command queue so next command can be loaded
         command_nav_queue.id    = NO_COMMAND;
 
@@ -158,7 +158,7 @@ static void verify_commands(void)
     }
 
     // check if conditional command completed
-    if(verify_may()) {
+    if(verify_cond_command()) {
         // clear conditional command queue so next command can be loaded
         command_cond_queue.id = NO_COMMAND;
     }