Include “Co-authored-by” attributions when calculating authors

(cherry picked from commit cb30176)

.mailmap

@@ -1,7 +1,7 @@
 Anders F Björklund <anders.f.bjorklund@gmail.com>
 Anders F Björklund <anders.f.bjorklund@gmail.com> <anders@itension.se>
 Anders F Björklund <anders.f.bjorklund@gmail.com> <anders@psqr.se>
-Andrew P Boie <andrew.p.boie@intel.com>
+Andrew Boie <andrew.p.boie@intel.com>
 Bernhard Bauer <bauerb@chromium.org> <bauerb@google.com>
 Chiaki Ishikawa <ishikawa@yk.rim.or.jp>
 Clemens Rabe <clemens.rabe@gmail.com> <clemens.rabe@clemensrabe.de>

dev.mk.in

@@ -190,9 +190,10 @@ doc/ccache.1: doc/MANUAL.xml
 
 .PHONY: update-authors
 update-authors:
-	git log --pretty=format:"%H %aN" \
-	  | grep -Ev 'd7c5056beda5483fcd5c098165fffd9be86fe98d' \
-	  | sed -r 's/[^ ]+/*/' \
+	git log --pretty=format:"%H %aN%n%(trailers:only)" \
+	  | grep -Ev 'd7c5056beda5483fcd5c098165fffd9be86fe98d|http|Conflicts:' \
+	  | grep '^[^ ]' \
+	  | sed -r -e 's/[^ ]+/*/' -e 's/<.*//' -e 's/ *$$//' \
 	  | sort -u \
 	  | perl -00 -p -i -e 's/^\*.*/<STDIN> . "\n"/es' doc/AUTHORS.adoc