git: Fix malformed utf8 recieved from git.

If git log outputs malformed utf8 in, eg, usernames, detect it and fix it
up. This avoids commits such as f71abc92aa
breaking things.

IkiWiki/Plugin/git.pm

@@ -139,6 +139,12 @@ sub safe_git (&@) {
 	my @lines;
 	while (<$OUT>) {
 		chomp;
+		
+		# check for invalid utf-8, and toss it back to avoid crashes
+		if (! utf8::valid($_)) {
+			$_=encode_utf8($_);
+		}
+
 		push @lines, $_;
 	}
 

debian/changelog

@@ -9,6 +9,7 @@ ikiwiki (3.03) UNRELEASED; urgency=low
   * comments: If comment content checks fail, store the comment
     (in .ikiwiki/comments_pending) for moderator review.
   * comments: Add a moderation web interface.
+  * git: Fix malformed utf8 recieved from git.
 
  -- Joey Hess <joeyh@debian.org>  Sun, 18 Jan 2009 14:50:57 -0500