commit dba93509ab70f940342e8436c0f89a70f1ece155
from: Martijn van Duren <martijn@openbsd.org>
date: Sun Apr  7 13:27:47 2019 UTC

Rmove mentioning of sha1.
According to RFC8301 it's dead (as it should be)

commit - 82063561a3124cdf860111a4561cab63da2a71fd
commit + dba93509ab70f940342e8436c0f89a70f1ece155
blob - 5304fe7c10238f435c52baab857f3eeb7d908773
blob + f6d059cc8c3a271f9788d24df1b937fae571f378
--- filter-dkim.1
+++ filter-dkim.1
@@ -36,8 +36,8 @@ The following flags are supported:
 .It Fl a
 The algorithm to use.
 This implementation only supports rsa cryptography.
-Only sha1 and sha256 should be used for hashing, since other algorithms are most
-likely not supported by verifiers.
+Only sha256 should be used for hashing, since other algorithms are most likely
+not supported by verifiers.
 Defaults to
 .Ar rsa-sha256 .
 .It Fl c