Document server.identity and server.hostname (and -i to varnishd)

Fixes #602

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4421 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/varnishd.1

@@ -43,6 +43,7 @@
 .Op Fl f Ar config
 .Op Fl g Ar group
 .Op Fl h Ar type Ns Op , Ns Ar options
+.Op Fl i Ar identity
 .Op Fl l Ar shmlogsize
 .Op Fl n Ar name
 .Op Fl P Ar file
@@ -138,6 +139,11 @@ Specifies the hash algorithm.
 See
 .Sx Hash Algorithms
 for a list of supported algorithms.
+.It Fl i Ar identity
+Specify the identity of the varnish server.  This can be accessed
+using
+.Va server.identity
+from VCL
 .It Fl l Ar shmlogsize
 Specify size of shmlog file.
 Scaling suffixes like 'k', 'm' can be used up to (e)tabytes.

man/vcl.7so

@@ -489,6 +489,20 @@ The following variables are available while processing a request:
 .Bl -tag -width 4n
 .It Va client.ip
 The client's IP address.
+.It Va server.hostname
+The host name of the server.
+.It Va server.identity
+The identity of the server, as set by the
+.Fl i
+parameter.
+If the
+.Fl i
+parameter is not passed to 
+.Nm varnishd ,
+.Va server.identity
+will be set to the name of the instance, as specified by the
+.Fl n
+parameter.
 .It Va server.ip
 The IP address of the socket on which the client connection was
 received.