upgrade selected login.conf to use auto rounds for bcrypt. the installer

already does this, so we don't want to go backwards on password changes.
ok krw

src/etc/etc.amd64/login.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: login.conf,v 1.6 2015/10/23 22:55:49 sthen Exp $
+# $OpenBSD: login.conf,v 1.7 2016/06/26 20:32:31 tedu Exp $
 
 #
 # Sample login.conf file.  See login.conf(5) for details.
@@ -47,7 +47,7 @@ default:\
 	:maxproc-cur=128:\
 	:openfiles-cur=512:\
 	:stacksize-cur=4M:\
-	:localcipher=blowfish,8:\
+	:localcipher=blowfish,a:\
 	:tc=auth-defaults:\
 	:tc=auth-ftp-defaults:
 
@@ -62,7 +62,7 @@ daemon:\
 	:maxproc=infinity:\
 	:openfiles-cur=128:\
 	:stacksize-cur=8M:\
-	:localcipher=blowfish,9:\
+	:localcipher=blowfish,a:\
 	:tc=default:
 
 #

src/etc/etc.i386/login.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: login.conf,v 1.5 2015/10/23 22:55:50 sthen Exp $
+# $OpenBSD: login.conf,v 1.6 2016/06/26 20:32:31 tedu Exp $
 
 #
 # Sample login.conf file.  See login.conf(5) for details.
@@ -47,7 +47,7 @@ default:\
 	:maxproc-cur=128:\
 	:openfiles-cur=512:\
 	:stacksize-cur=4M:\
-	:localcipher=blowfish,8:\
+	:localcipher=blowfish,a:\
 	:tc=auth-defaults:\
 	:tc=auth-ftp-defaults:
 
@@ -62,7 +62,7 @@ daemon:\
 	:maxproc=infinity:\
 	:openfiles-cur=128:\
 	:stacksize-cur=8M:\
-	:localcipher=blowfish,9:\
+	:localcipher=blowfish,a:\
 	:tc=default:
 
 #

src/etc/etc.macppc/login.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: login.conf,v 1.5 2015/10/23 22:55:50 sthen Exp $
+# $OpenBSD: login.conf,v 1.6 2016/06/26 20:32:31 tedu Exp $
 
 #
 # Sample login.conf file.  See login.conf(5) for details.
@@ -47,7 +47,7 @@ default:\
 	:maxproc-cur=128:\
 	:openfiles-cur=512:\
 	:stacksize-cur=4M:\
-	:localcipher=blowfish,8:\
+	:localcipher=blowfish,a:\
 	:tc=auth-defaults:\
 	:tc=auth-ftp-defaults:
 
@@ -62,7 +62,7 @@ daemon:\
 	:maxproc=infinity:\
 	:openfiles-cur=128:\
 	:stacksize-cur=8M:\
-	:localcipher=blowfish,9:\
+	:localcipher=blowfish,a:\
 	:tc=default:
 
 #

src/etc/etc.sparc64/login.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: login.conf,v 1.5 2015/10/23 22:55:50 sthen Exp $
+# $OpenBSD: login.conf,v 1.6 2016/06/26 20:32:31 tedu Exp $
 
 #
 # Sample login.conf file.  See login.conf(5) for details.
@@ -47,7 +47,7 @@ default:\
 	:maxproc-cur=128:\
 	:openfiles-cur=512:\
 	:stacksize-cur=4M:\
-	:localcipher=blowfish,8:\
+	:localcipher=blowfish,a:\
 	:tc=auth-defaults:\
 	:tc=auth-ftp-defaults:
 
@@ -62,7 +62,7 @@ daemon:\
 	:maxproc=infinity:\
 	:openfiles-cur=128:\
 	:stacksize-cur=8M:\
-	:localcipher=blowfish,9:\
+	:localcipher=blowfish,a:\
 	:tc=default:
 
 #