[6.0] a3b50786c signedness improvements

[Reza Naghibi]

commit a3b50786c6550d49e8e585c79011f7715b48f385
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Wed Jun 10 08:59:26 2020 +0200

    signedness improvements
    
    from flexelint review
    
     Conflicts:
            lib/libvmod_directors/shard_dir.h

diff --git a/lib/libvmod_directors/shard_dir.h b/lib/libvmod_directors/shard_dir.h
index 8d1b86b52..fc59bc8fd 100644
--- a/lib/libvmod_directors/shard_dir.h
+++ b/lib/libvmod_directors/shard_dir.h
@@ -77,8 +77,8 @@ struct sharddir {
 
 	const char				*name;
 
-	int					n_backend;
-	int					l_backend;
+	unsigned				n_backend;
+	unsigned				l_backend;
 	struct shard_backend			*backend;
 
 	struct shard_circlepoint		*hashcircle;