Add missing contributors, update others.

Add contributors who weren't added (although they appeared as the author
of some changes in the Git logs), update Gianluca Varenni's address,
dotify the name in Scott Mcmillan's address.

CREDITS

@@ -44,7 +44,8 @@ Additional people who have contributed patches:
     Franz Schaefer                <schaefer at mond dot at>
     Fulko Hew                     <fulko dot hew at gmail dot com>
     Fumiyuki Shimizu              <fumifumi at abacustech dot jp>
-    Gianluca Varenni              <varenni at netgroup-serv dot polito dot it>
+    Garrett Cooper                <yaberauneya at sourceforge dot net>
+    Gianluca Varenni              <gianluca dot varenni at gmail dot com>
     Gilbert Hoyek                 <gil_hoyek at hotmail dot com>
     Gisle Vanem                   <gvanem at broadpark dot no>
     Graeme Hewson                 <ghewson at cix dot compulink dot co dot uk>
@@ -53,6 +54,7 @@ Additional people who have contributed patches:
     Gregor Maier                  <gregor at net dot in dot tum dot de>
     Guillaume Pelat               <endymion_ at users dot sourceforge dot net>
     Hagen Paul Pfeifer            <hagen at jauu dot net>
+    Henri Doreau                  <hdoreau at sourceforge dot net>
     Hyung Sik Yoon                <hsyn at kr dot ibm dot com>
     Igor Khristophorov            <igor at atdot dot org>
     Jan-Philip Velders            <jpv at veldersjes dot net>
@@ -61,12 +63,14 @@ Additional people who have contributed patches:
     Jean Tourrilhes               <jt at hpl dot hp dot com>
     Jean-Louis Charton            <Jean-Louis.CHARTON at oikialog dot com>
     Jefferson Ogata               <jogata at nodc dot noaa dot gov>
+    Jesper Dangaard Brouer        <hawk at comx dot dk>
     Jesper Peterson               <jesper at endace dot com>
     Joerg Mayer                   <jmayer at loplof dot de>
     John Bankier                  <jbankier at rainfinity dot com>
     Jon Lindgren                  <jonl at yubyub dot net>
     Jon Smirl                     <jonsmirl at gmail dot com>
     Juergen Schoenwaelder         <schoenw at ibr dot cs dot tu-bs dot de>
+    Julien Moutinho               <julm at savines dot alpes dot fr dot eu dot org>
     Jung-uk Kim                   <jkim at FreeBSD dot org>
     Kazushi Sugyo                 <sugyo at pb dot jp dot nec dot com>
     Klaus Klein                   <kleink at netbsd dot org>
@@ -117,7 +121,7 @@ Additional people who have contributed patches:
     Sagun Shakya                  <sagun dot shakya at sun dot com>
     Scott Barron                  <sb125499 at ohiou dot edu>
     Scott Gifford                 <sgifford at tir dot com>
-    Scott Mcmillan                <scott.a.mcmillan at intel dot com>
+    Scott Mcmillan                <scott dot a dot mcmillan at intel dot com>
     Sebastian Krahmer             <krahmer at cs dot uni-potsdam dot de>
     Sebastien Roy                 <Sebastien dot Roy at Sun dot COM>
     Sepherosa Ziehau              <sepherosa at gmail dot com>