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/rpc-cache.txt b/Documentation/rpc-cache.txt
index 5f757c8..21fb09c 100644
--- a/Documentation/rpc-cache.txt
+++ b/Documentation/rpc-cache.txt
@@ -24,7 +24,7 @@
    - general cache lookup with correct locking
    - supporting 'NEGATIVE' as well as positive entries
    - allowing an EXPIRED time on cache items, and removing
-     items after they expire, and are no longe in-use.
+     items after they expire, and are no longer in-use.
    - making requests to user-space to fill in cache entries
    - allowing user-space to directly set entries in the cache
    - delaying RPC requests that depend on as-yet incomplete