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

mechanical change: create the manual pages.

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

man/coredns-cache.7

@@ -1,11 +1,11 @@
 .\" Generated by Mmark Markdown Processer - mmark.nl
-.TH "COREDNS-CACHE" "7" "April 2019" "CoreDNS" "CoreDNS Plugins"
+.TH "COREDNS-CACHE" 7 "June 2019" "CoreDNS" "CoreDNS Plugins"
 
-.SH NAME
+.SH "NAME"
 .PP
 \fIcache\fP - enables a frontend cache.
 
-.SH DESCRIPTION
+.SH "DESCRIPTION"
 .PP
 With \fIcache\fP enabled, all records except zone transfers and metadata records will be cached for up to
 3600s. Caching is mostly useful in a scenario when fetching data from the backend (upstream,
@@ -14,7 +14,7 @@ database, etc.) is expensive.
 .PP
 This plugin can only be used once per Server Block.
 
-.SH SYNTAX
+.SH "SYNTAX"
 .PP
 .RS
 
@@ -72,7 +72,7 @@ which defaults to \fB\fC10%\fR, or latest 1 second before TTL expiration. Values
 Note the percent sign is mandatory. \fBPERCENTAGE\fP is treated as an \fB\fCint\fR.
 
 
-.SH CAPACITY AND EVICTION
+.SH "CAPACITY AND EVICTION"
 .PP
 If \fBCAPACITY\fP \fIis not\fP specified, the default cache size is 9984 per cache. The minimum allowed cache size is 1024.
 If \fBCAPACITY\fP \fIis\fP specified, the actual cache size used will be rounded down to the nearest number divisible by 256 (so all shards are equal in size).
@@ -83,7 +83,7 @@ Since shards don't fill up perfectly evenly, evictions will occur before the ent
 Each shard capacity is equal to the total cache size / number of shards (256). Eviction is random, not TTL based.
 Entries with 0 TTL will remain in the cache until randomly evicted when the shard reaches capacity.
 
-.SH METRICS
+.SH "METRICS"
 .PP
 If monitoring is enabled (via the \fIprometheus\fP directive) then the following metrics are exported:
 
@@ -101,7 +101,7 @@ If monitoring is enabled (via the \fIprometheus\fP directive) then the following
 Cache types are either "denial" or "success". \fB\fCServer\fR is the server handling the request, see the
 metrics plugin for documentation.
 
-.SH EXAMPLES
+.SH "EXAMPLES"
 .PP
 Enable caching for all zones, but cap everything to a TTL of 10 seconds: