doc: make -f Makefile.doc (#2919)

mechanical change: create the manual pages.

Signed-off-by: Miek Gieben <miek@miek.nl>

man/coredns-dnssec.7

@@ -1,11 +1,11 @@
 .\" Generated by Mmark Markdown Processer - mmark.nl
-.TH "COREDNS-DNSSEC" "7" "April 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-DNSSEC" 7 "June 2019" "CoreDNS" "CoreDNS Plugins"
 
-.SH NAME
+.SH "NAME"
 .PP
 \fIdnssec\fP - enable on-the-fly DNSSEC signing of served data.
 
-.SH DESCRIPTION
+.SH "DESCRIPTION"
 .PP
 With \fIdnssec\fP any reply that doesn't (or can't) do DNSSEC will get signed on the fly. Authenticated
 denial of existence is implemented with NSEC black lies. Using ECDSA as an algorithm is preferred as
@@ -14,7 +14,7 @@ this leads to smaller signatures (compared to RSA). NSEC3 is \fInot\fP supported
 .PP
 This plugin can only be used once per Server Block.
 
-.SH SYNTAX
+.SH "SYNTAX"
 .PP
 .RS
 
@@ -67,7 +67,7 @@ generated private key \fB\fCKexample.org+013+45330.private\fR
 RRSIGs. The default for \fBCAPACITY\fP is 10000.
 
 
-.SH METRICS
+.SH "METRICS"
 .PP
 If monitoring is enabled (via the \fIprometheus\fP directive) then the following metrics are exported:
 
@@ -82,7 +82,7 @@ If monitoring is enabled (via the \fIprometheus\fP directive) then the following
 .PP
 The label \fB\fCserver\fR indicated the server handling the request, see the \fImetrics\fP plugin for details.
 
-.SH EXAMPLES
+.SH "EXAMPLES"
 .PP
 Sign responses for \fB\fCexample.org\fR with the key "Kexample.org.+013+45330.key".