Fix a few typos.

examples/ftpc/ftpc_cmds.c

@@ -89,7 +89,7 @@ int cmd_rquit(SESSION handle, int argc, char **argv)
     {
       printf("quit failed: %d\n", errno);
     }
-  printf("Exitting...\n");
+  printf("Exiting...\n");
   exit(0);
   return ERROR;
 }

examples/telnetd/telnetd.c

@@ -256,7 +256,7 @@ int telnetd_main(int argc, char *argv[])
   ret = telnetd_start(&config);
   if (ret < 0)
     {
-      printf("Failed to tart the Telnet daemon\n");
+      printf("Failed to start the Telnet daemon\n");
     }
 
   printf("telnetd_main: Exiting\n");

netutils/dhcpc/dhcpc.c

@@ -230,6 +230,10 @@ static int dhcpc_sendmsg(FAR struct dhcpc_state_s *pdhcpc,
       /* Broadcast DISCOVER message to all servers */
 
       case DHCPDISCOVER:
+        /* REVISIT: We don't need the broadcast flag since we can receive
+         * unicast traffic before being fully configured.
+         */
+
         pdhcpc->packet.flags = HTONS(BOOTP_BROADCAST); /*  Broadcast bit. */
         pend     = dhcpc_addreqoptions(pend);
         break;
@@ -237,6 +241,10 @@ static int dhcpc_sendmsg(FAR struct dhcpc_state_s *pdhcpc,
       /* Send REQUEST message to the server that sent the *first* OFFER */
 
       case DHCPREQUEST:
+        /* REVISIT: We don't need the broadcast flag since we can receive
+         * unicast traffic before being fully configured.
+         */
+
         pdhcpc->packet.flags = HTONS(BOOTP_BROADCAST); /*  Broadcast bit. */
         memcpy(pdhcpc->packet.ciaddr, &pdhcpc->ipaddr.s_addr, 4);
         pend     = dhcpc_addserverid(&pdhcpc->serverid, pend);

netutils/webserver/httpd.c

@@ -900,7 +900,7 @@ static void *httpd_handler(void *arg)
 
   /* Exit the task */
 
-  ninfo("[%d] Exitting\n", sockfd);
+  ninfo("[%d] Exiting\n", sockfd);
   close(sockfd);
   return NULL;
 }

testing/ostest/ostest_main.c

@@ -556,7 +556,7 @@ static int user_main(int argc, char *argv[])
       show_memory_usage(&g_mmbefore, &g_mmafter);
     }
 
-  printf("user_main: Exitting\n");
+  printf("user_main: Exiting\n");
   return 0;
 }
 

testing/ostest/rmutex.c

@@ -110,7 +110,7 @@ static FAR void *thread_outer(FAR void *parameter)
       thread_inner((int)((intptr_t)parameter), 0);
     }
 
-  printf("thread_outer[%d]: Exitting\n", (int)((intptr_t)parameter));
+  printf("thread_outer[%d]: Exiting\n", (int)((intptr_t)parameter));
   pthread_exit(NULL);
   return NULL; /* Non-reachable -- needed for some compilers */
 }

testing/ostest/robust.c

@@ -75,7 +75,7 @@ static FAR void *robust_waiter(FAR void *parameter)
     }
   else
     {
-      printf("robust_waiter: Exitting with mutex\n");
+      printf("robust_waiter: Exiting with mutex\n");
     }
 
   sleep(2);