Proposed change to vstart.sh

[Joe Buck <jbbuck@gmail.com>]

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It looks like vstart.sh does not work without authx enabled. Given that, 
I'd propose to change the default to having cephx be enabled and then 
use the -x flag to disable cephx.

Interestingly enough, the help output for vstart.sh already states that 
the -x flag disables authx (which is not the case at present, but is 
after this patch is applied).

I've attached a patch to vstart that 1) changes the mention of authx to 
cephx for consistency and 2) defaults vstart.sh to using cephx with the 
-x flag now serving to disable cephx.

Best,
-Joe Buck

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diff --git a/src/vstart.sh b/src/vstart.sh
index 7aaad49..b23b83a 100755
--- a/src/vstart.sh
+++ b/src/vstart.sh
@@ -21,7 +21,7 @@ ip=""
 nodaemon=0
 smallmds=0
 overwrite_conf=1
-cephx=0
+cephx=1 #turn cephx on by default
 
 MON_ADDR=""
 
@@ -43,7 +43,7 @@ usage=$usage"\t--nodaemon: use ceph-run as wrapper for mon/osd/mds\n"
 usage=$usage"\t--smallmds: limit mds cache size\n"
 usage=$usage"\t-m ip:port\t\tspecify monitor address\n"
 usage=$usage"\t-k keep old configuration files\n"
-usage=$usage"\t-x disable authx\n"
+usage=$usage"\t-x disable cephx\n"
 usage=$usage"\t-o config\t\t add extra config parameters to mds section\n"
 
 usage_exit() {
@@ -117,7 +117,7 @@ case $1 in
 	    shift
 	    ;;
     -x )
-	    cephx=1
+	    cephx=0
 	    ;;
     -k )
 	    overwrite_conf=0