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

mechanical change: create the manual pages.

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

man/coredns-erratic.7

@@ -1,11 +1,11 @@
 .\" Generated by Mmark Markdown Processer - mmark.nl
-.TH "COREDNS-ERRATIC" "7" "April 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-ERRATIC" 7 "June 2019" "CoreDNS" "CoreDNS Plugins"
 
-.SH NAME
+.SH "NAME"
 .PP
 \fIerratic\fP - a plugin useful for testing client behavior.
 
-.SH DESCRIPTION
+.SH "DESCRIPTION"
 .PP
 \fIerratic\fP returns a static response to all queries, but the responses can be delayed, dropped or truncated.
 The \fIerratic\fP plugin will respond to every A or AAAA query. For any other type it will return
@@ -20,7 +20,7 @@ AXFR request it will respond with a small zone transfer.
 \fIerratic\fP can also be used in conjunction with the \fIautopath\fP plugin. This is mostly to aid in
 testing.
 
-.SH SYNTAX
+.SH "SYNTAX"
 .PP
 .RS
 
@@ -46,11 +46,11 @@ the default for \fBDURATION\fP is 100ms.
 .PP
 In case of a zone transfer and truncate the final SOA record \fIisn't\fP added to the response.
 
-.SH READY
+.SH "READY"
 .PP
 This plugin reports readiness to the ready plugin.
 
-.SH EXAMPLES
+.SH "EXAMPLES"
 .PP
 .RS
 
@@ -128,7 +128,7 @@ Drop every second query.
 .fi
 .RE
 
-.SH ALSO SEE
+.SH "ALSO SEE"
 .PP
 RFC 3849
 \[la]https://tools.ietf.org/html/rfc3849\[ra] and