doc: run make -f Makefile.doc (#3595)

Update the docs (mechanical change).

Also run: go generate (no changes, good!)
Signed-off-by: Miek Gieben <miek@miek.nl>

man/coredns-acl.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-ACL" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-ACL" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .PP
 \fIacl\fP - enforces access control policies on source ip and prevents unauthorized access to DNS servers.

man/coredns-autopath.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-AUTOPATH" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-AUTOPATH" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-bind.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-BIND" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-BIND" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-bufsize.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-BUFSIZE" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-BUFSIZE" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-cache.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-CACHE" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-CACHE" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-clouddns.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-CLOUDDNS" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-CLOUDDNS" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-dnssec.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-DNSSEC" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-DNSSEC" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-file.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-FILE" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-FILE" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-forward.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-FORWARD" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-FORWARD" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-grpc.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-GRPC" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-GRPC" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-health.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-HEALTH" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-HEALTH" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-hosts.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-HOSTS" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-HOSTS" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-import.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-IMPORT" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-IMPORT" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-kubernetes.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-KUBERNETES" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-KUBERNETES" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-reload.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-RELOAD" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-RELOAD" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-rewrite.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-REWRITE" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-REWRITE" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-route53.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-ROUTE53" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-ROUTE53" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-secondary.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-SECONDARY" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-SECONDARY" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-sign.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-SIGN" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-SIGN" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP
@@ -43,7 +43,7 @@ the signature only has 14 days left before expiring.
 Both these dates are only checked on the SOA's signature(s).
 .IP \(bu 4
 Create RRSIGs that have an inception of -3 hours (minus a jitter between 0 and 18 hours)
-and a expiration of +32 days for every given DNSKEY.
+and a expiration of +32 (plus a jitter between 0 and 5 days) days for every given DNSKEY.
 .IP \(bu 4
 Add NSEC records for all names in the zone. The TTL for these is the negative cache TTL from the
 SOA record.

man/coredns-template.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-TEMPLATE" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-TEMPLATE" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-tls.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-TLS" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-TLS" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP

man/coredns-transfer.7

 .\" Generated by Mmark Markdown Processer - mmark.miek.nl
-.TH "COREDNS-TRANSFER" 7 "December 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-TRANSFER" 7 "January 2020" "CoreDNS" "CoreDNS Plugins"
 
 .SH "NAME"
 .PP