include: Fix typos

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>

include/nsswitch.h

@@ -186,7 +186,7 @@ typedef ns_mtab *(*nss_module_register_fn)(const char *, unsigned int *,
 
 /* 
  * Many NSS interfaces follow the getXXnam, getXXid, getXXent pattern.
- * Developers are encouraged to use nss_lookup_type where approriate.
+ * Developers are encouraged to use nss_lookup_type where appropriate.
  */
 enum nss_lookup_type {
 	nss_lt_name = 1,

include/protocols/talkd.h

@@ -56,7 +56,7 @@
 
 /*
  * The talk protocol embeds a 4.3BSD sockaddr.  Define our own version
- * rather then relying on namespace polution in kernel headers.
+ * rather then relying on namespace pollution in kernel headers.
  */
 struct tsockaddr {
 	unsigned short sa_family;

include/rpc/rpc_msg.h

@@ -49,7 +49,7 @@
 
 /*
  * Bottom up definition of an rpc message.
- * NOTE: call and reply use the same overall stuct but
+ * NOTE: call and reply use the same overall struct but
  * different parts of unions within it.
  */
 

include/stdlib.h

@@ -131,7 +131,7 @@ size_t	 wcstombs(char * __restrict, const wchar_t * __restrict, size_t);
  * is not supported in the compilation environment (which therefore means
  * that it can't really be ISO C99).
  *
- * (The only other extension made by C99 in thie header is _Exit().)
+ * (The only other extension made by C99 in this header is _Exit().)
  */
 #if __ISO_C_VISIBLE >= 1999 || defined(__cplusplus)
 #ifdef __LONG_LONG_SUPPORTED