Fix typos in Documentation/: 'H'-'M'

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'H'-'M'.

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 8410618..8d6590d 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1588,7 +1588,7 @@
 default is  to  use  the  BSD  compatible interpretation of the urgent pointer
 pointing to the first byte after the urgent data. The RFC793 interpretation is
 to have  it  point  to  the last byte of urgent data. Enabling this option may
-lead to interoperatibility problems. Disabled by default.
+lead to interoperability problems. Disabled by default.
 
 tcp_syncookies
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