ft: rename ftutil to ft (prep for auth-proto)

Now the 'ft' module, previously ftutil, will be used to drive FT via
the auth-proto virtual class. This renaming is in preparation as
ftutil will become obsolete since all the IE building/processing is
going to be moved out of netdev. The new ft.c module will utilize
the existing ftutil functionality, but since this is now a full blown
auth protocol naming it 'ft' is better suited.

Makefile.am

@@ -194,7 +194,7 @@ src_iwd_SOURCES = src/main.c linux/nl80211.h src/iwd.h src/missing.h \
 					src/knownnetworks.h \
 					src/knownnetworks.c \
 					src/rfkill.h src/rfkill.c \
-					src/ftutil.h src/ftutil.c \
+					src/ft.h src/ft.c \
 					src/ap.h src/ap.c \
 					src/adhoc.h src/adhoc.c \
 					src/sae.h src/sae.c \

src/ft.c

@@ -31,7 +31,7 @@
 #include "src/ie.h"
 #include "src/handshake.h"
 #include "src/crypto.h"
-#include "src/ftutil.h"
+#include "src/ft.h"
 #include "src/mpdu.h"
 
 /*

src/netdev.c

@@ -53,7 +53,7 @@
 #include "src/scan.h"
 #include "src/netdev.h"
 #include "src/wscutil.h"
-#include "src/ftutil.h"
+#include "src/ft.h"
 #include "src/util.h"
 #include "src/watchlist.h"
 #include "src/sae.h"