Fix "can not" in Documentation and Kconfig

Randy brought it to my attention that in proper english "can not" should always
be written "cannot". I donot see any reason to argue, even if I mightnot
understand why this rule exists.  This patch fixes "can not" in several
Documentation files as well as three Kconfigs.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 8d6590d..59763d6 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1733,7 +1733,7 @@
 
 These  parameters  are used to limit how many ICMP destination unreachable to 
 send  from  the  host  in question. ICMP destination unreachable messages are 
-sent  when  we can not reach the next hop, while trying to transmit a packet. 
+sent  when  we  cannot reach  the next hop while trying to transmit a packet. 
 It  will also print some error messages to kernel logs if someone is ignoring 
 our   ICMP  redirects.  The  higher  the  error_cost  factor  is,  the  fewer 
 destination  unreachable  and error messages will be let through. Error_burst