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

mechanical change: create the manual pages.

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

man/coredns-nsid.7

@@ -1,11 +1,11 @@
 .\" Generated by Mmark Markdown Processer - mmark.nl
-.TH "COREDNS-NSID" "7" "April 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-NSID" 7 "June 2019" "CoreDNS" "CoreDNS Plugins"
 
-.SH NAME
+.SH "NAME"
 .PP
 \fInsid\fP - adds an identifier of this server to each reply.
 
-.SH DESCRIPTION
+.SH "DESCRIPTION"
 .PP
 This plugin implements RFC 5001
 \[la]https://tools.ietf.org/html/rfc5001\[ra] and adds an EDNS0 OPT
@@ -15,7 +15,7 @@ see which server was responsible for generating the reply and for debugging.
 .PP
 This plugin can only be used once per Server Block.
 
-.SH SYNTAX
+.SH "SYNTAX"
 .PP
 .RS
 
@@ -31,7 +31,7 @@ nsid [DATA]
 .PP
 If \fBDATA\fP is not given, the host's name is used.
 
-.SH EXAMPLES
+.SH "EXAMPLES"
 .PP
 Enable nsid:
 
@@ -71,7 +71,7 @@ And now a client with NSID support will see an OPT record with the NSID option:
 .fi
 .RE
 
-.SH ALSO SEE
+.SH "ALSO SEE"
 .PP
 RFC 5001
 \[la]https://tools.ietf.org/html/rfc5001\[ra]