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

mechanical change: create the manual pages.

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

man/coredns-loadbalance.7

@@ -1,11 +1,11 @@
 .\" Generated by Mmark Markdown Processer - mmark.nl
-.TH "COREDNS-LOADBALANCE" "7" "April 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-LOADBALANCE" 7 "June 2019" "CoreDNS" "CoreDNS Plugins"
 
-.SH NAME
+.SH "NAME"
 .PP
 \fIloadbalance\fP - randomize the order of A, AAAA and MX records.
 
-.SH DESCRIPTION
+.SH "DESCRIPTION"
 .PP
 The \fIloadbalance\fP will act as a round-robin DNS loadbalancer by randomizing the order of A, AAAA,
 and MX records in the answer.
@@ -16,7 +16,7 @@ See Wikipedia
 setup. It will take care to sort any CNAMEs before any address records, because some stub resolver
 implementations (like glibc) are particular about that.
 
-.SH SYNTAX
+.SH "SYNTAX"
 .PP
 .RS
 
@@ -30,7 +30,7 @@ loadbalance [POLICY]
 \fBPOLICY\fP is how to balance, the default, and only option, is "round_robin".
 
 
-.SH EXAMPLES
+.SH "EXAMPLES"
 .PP
 Load balance replies coming back from Google Public DNS: