Generate man-pages (#2439)

Almost 100% mechanical change, except the fact that import/import.md
is moved to import/README.md

No content changes.

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

man/coredns-import.7

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+.\" generated with Ronn/v0.7.3
+.\" http://github.com/rtomayko/ronn/tree/0.7.3
+.
+.TH "COREDNS\-IMPORT" "7" "January 2019" "CoreDNS" "CoreDNS plugins"
+.
+.SH "NAME"
+\fIimport\fR \- include files or reference snippets from a Corefile\.
+.
+.SH "DESCRIPTION"
+The \fIimport\fR plugin can be used to incude files into the main configuration\. Another use it to reference predefined snippets\. Both can help to avoid some duplication\.
+.
+.P
+This is a unique directive in that \fIimport\fR can appear outside of a server block\. In other words, it can appear at the top of a Corefile where an address would normally be\.
+.
+.SH "SYNTAX"
+.
+.nf
+
+import PATTERN
+.
+.fi
+.
+.IP "\(bu" 4
+\fBPATTERN\fR is the file, glob pattern (\fB*\fR) or snippet to include\. Its contents will replace this line, as if that file\'s contents appeared here to begin with\.
+.
+.IP "" 0
+.
+.SH "FILES"
+You can use \fIimport\fR to include a file or files\. This file\'s location is relative to the Corefile\'s location\. It is an error if a specific file cannot be found, but an empty glob pattern is not an error\.
+.
+.SH "SNIPPETS"
+You can define snippets to be reused later in your Corefile by defining a block with a single\-token label surrounded by parentheses:
+.
+.IP "" 4
+.
+.nf
+
+(mysnippet) {
+    \.\.\.
+}
+.
+.fi
+.
+.IP "" 0
+.
+.P
+Then you can invoke the snippet with \fIimport\fR:
+.
+.IP "" 4
+.
+.nf
+
+import mysnippet
+.
+.fi
+.
+.IP "" 0
+.
+.SH "EXAMPLES"
+Import a shared configuration:
+.
+.IP "" 4
+.
+.nf
+
+\&\. {
+   import config/common\.conf
+}
+.
+.fi
+.
+.IP "" 0
+.
+.P
+Where \fBconfig/common\.conf\fR contains:
+.
+.IP "" 4
+.
+.nf
+
+prometheus
+errors
+log
+.
+.fi
+.
+.IP "" 0
+.
+.P
+This imports files found in the zones directory:
+.
+.IP "" 4
+.
+.nf
+
+import \.\./zones/*
+.
+.fi
+.
+.IP "" 0
+.
+.SH "ALSO SEE"
+See corefile(5)\.