[src/trunk]: src/lib/libcrypt - bump blowfish size, explain version

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0e45ec8ff408
branches:  trunk
changeset: 746234:0e45ec8ff408
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Mar 25 18:37:08 2020 +0000

description:
- bump blowfish size, explain version
- add passwd xref

diffstat:

 lib/libcrypt/pw_gensalt.3 |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (33 lines):

diff -r b7748a200f85 -r 0e45ec8ff408 lib/libcrypt/pw_gensalt.3
--- a/lib/libcrypt/pw_gensalt.3 Wed Mar 25 18:36:29 2020 +0000
+++ b/lib/libcrypt/pw_gensalt.3 Wed Mar 25 18:37:08 2020 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: pw_gensalt.3,v 1.1 2020/03/25 17:11:06 christos Exp $
+.\"    $NetBSD: pw_gensalt.3,v 1.2 2020/03/25 18:37:08 christos Exp $
 .\"
 .\" Copyright (c) 2020 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -116,11 +116,14 @@
 .Sq blowfish
 algorithm.
 The minimum salt size is
-.Dv 30
+.Dv 31
 and the number of rounds needs to be specified in
 .Ar option .
 This is of the form:
 .Li $2a$nrounds$??????????????????????$ .
+The
+.Li 2
+in the salt string indicates the current blowfish version.
 .\" .It argon2
 .\" .It argon2id
 .\" .It argon2i
@@ -146,6 +149,7 @@
 .Ar type.
 .El
 .Sh SEE ALSO
+.Xr passwd 1 ,
 .Xr pwhash 1
 .Sh HISTORY
 The