HACKING: Fix spelling mistakes

Acked-by: Vincent Jardin <vincent.jardin@6wind.com>
diff --git a/HACKING.tex b/HACKING.tex
index 6b27ebf..57235b1 100644
--- a/HACKING.tex
+++ b/HACKING.tex
@@ -57,7 +57,7 @@
 See line 2 of HACKING.tex, the source for this document, for an example.
 
 This placeholder string will be expanded out by the `git archive' commands,
-wihch is used to generate the tar archives for snapshots and releases.
+which is used to generate the tar archives for snapshots and releases.
 
 Please document fully the proper use of a new function in the header file
 in which it is declared.  And please consult existing headers for
@@ -73,7 +73,7 @@
 an orderly manner. If at all possible, try to retain the old deprecated
 interface as is, or functionally equivalent. Make a note of when the
 interface was deprecated and guard the deprecated interface definitions in
-the header file, ie:
+the header file, i.e.:
 
 \begin{verbatim}
 /* Deprecated: 20050406 */
@@ -172,9 +172,9 @@
 
 Please think very carefully before making code conditional at compile time,
 as it increases maintenance burdens and user confusion. In particular,
-please avoid gratuitious --enable-\ldots switches to the configure script -
+please avoid gratuitous --enable-\ldots switches to the configure script -
 typically code should be good enough to be in Quagga, or it shouldn't be
-there at all.
+there at all. 
 
 When code must be compile-time conditional, try have the compiler make it
 conditional rather than the C pre-processor - so that it will still be
@@ -256,7 +256,7 @@
 This itemised commit messages allows reviewers to have confidence that the
 author has self-reviewed every line of the patch, as well as providing
 reviewers a clear index of which changes are intended, and descriptions for
-them (C-to-english descriptions are not desireable - some discretion is
+them (C-to-english descriptions are not desirable - some discretion is
 useful).  For short patches, a per-function/file break-down may be
 redundant.  For longer patches, such a break-down may be essential.  A
 contrived example (where the general discussion is obviously somewhat
@@ -299,7 +299,7 @@
 \section{RELEASE PROCEDURE}
 
 \begin{itemize}
-\item Tag the apppropriate commit with a release tag (follow existing
+\item Tag the appropriate commit with a release tag (follow existing
   conventions).
   
   [This enables recreating the release, and is just good CM practice.]
@@ -388,7 +388,7 @@
 \label{sec:git-submission}
 
 The preferred method for submitting changes is to provide git commits via a
-publically-accessible git repository, which the maintainers can easily pull.
+publicly-accessible git repository, which the maintainers can easily pull.
 
 The commits should be in a branch based off the Quagga.net master - a
 "feature branch".  Ideally there should be no commits to this branch other
@@ -440,8 +440,8 @@
 \item Do not make gratuitous changes to whitespace. See the w and b arguments
       to diff.
 
-\item Changes should be arranged so that the least contraversial and most
-      trivial are first, and the most complex or more contraversial are
+\item Changes should be arranged so that the least controversial and most
+      trivial are first, and the most complex or more controversial are
       last.  This will maximise how many the Quagga maintainers can merge,
       even if some other commits need further work.
 
@@ -473,7 +473,7 @@
 \item Only apply patches that meet the submission guidelines.
 
 \item If the patch might break something, issue a call for testing on the
-      mailinglist.
+      mailing-list.
 
 \item Give an appropriate commit message (see above), and use the --author
       argument to git-commit, if required, to ensure proper attribution (you