Add xmllint completion to review.

to_review/xmllint

@@ -0,0 +1,35 @@
+# -*- mode: shell-script; sh-basic-offset: 8; indent-tabs-mode: t -*-
+# ex: ts=8 sw=8 noet filetype=sh
+#
+# bash completion for xmllint(1)
+
+have xmllint &&
+_xmllint()
+{
+	local cur prev
+
+	COMPREPLY=()
+	cur=`_get_cword`
+	prev=${COMP_WORDS[COMP_CWORD-1]}
+
+	case "$prev" in
+		-o|--output)
+			_filedir
+			return 0
+			;;
+		--path|--dtdvalid|--dtdvalidfpi|--maxmem|--encode|--pattern|\
+		--relaxng|--schema|--schematron)
+			return 0
+			;;
+	esac
+
+	if [[ "$cur" == -* ]]; then
+		COMPREPLY=( $( compgen -W '$( xmllint --help 2>&1 | \
+			sed -ne "s/^[[:space:]]*\(--[^[:space:]:]*\).*/\1/p" ) \
+			-o' -- $cur ) )
+		return 0
+	fi
+
+	_filedir '@(*ml|htm|svg)'
+} &&
+complete -F _xmllint $filenames xmllint