Fix-more-typos-using-codespell

Committing nearly all changes done by 'codespell_check.sh -w'

Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>

contrib/apps/httpserver/httpserver-netconn.c

@@ -40,7 +40,7 @@ http_server_netconn_serve(struct netconn *conn)
         buf[4]=='/' ) {
 
       /* Send the HTML header
-             * subtract 1 from the size, since we dont send the \0 in the string
+             * subtract 1 from the size, since we don't send the \0 in the string
              * NETCONN_NOCOPY: our data is const static, so no need to copy it
        */
       netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);

contrib/ports/unix/lib/lwipopts.h

@@ -40,7 +40,7 @@
 
 /*
  * Include user defined options first. Anything not defined in these files
- * will be set to standard values. Override anything you dont like!
+ * will be set to standard values. Override anything you don't like!
  */
 #include "lwipopts.h"
 #include "lwip/debug.h"

contrib/ports/unix/port/netif/sio.c

@@ -66,7 +66,7 @@
 #define FALSE 0
 #endif
 
-/* for all of you who dont define SIO_DEBUG in debug.h */
+/* for all of you who don't define SIO_DEBUG in debug.h */
 #ifndef SIO_DEBUG
 #define SIO_DEBUG 0
 #endif