Update readme file to highlight user impersonation feature

Lucian Matei · Lucian Matei · commit 1de98a094fef · 2016-04-15T18:07:41.000+03:00
diff --git a/README.md b/README.md
@@ -592,6 +592,10 @@ or in the job config when using POST /jobs,
         spark.cores.max = 10
     }
 
+User impersonation for an already Kerberos authenticated user is supported via `spark.proxy.user` query param:
+  
+  POST /contexts/my-new-context?spark.proxy.user=<user-to-impersonate>
+
 To pass settings directly to the sparkConf that do not use the "spark." prefix "as-is", use the "passthrough" section.
 
     spark.context-settings {

Original file line number	Diff line number	Diff line change
`@@ -592,6 +592,10 @@ or in the job config when using POST /jobs,`
`592`	`592`	`spark.cores.max = 10`
`593`	`593`	`}`
`594`	`594`
	`595`	+User impersonation for an already Kerberos authenticated user is supported via `spark.proxy.user` query param:
	`596`	`+`
	`597`	`+ POST /contexts/my-new-context?spark.proxy.user=<user-to-impersonate>`
	`598`	`+`
`595`	`599`	`To pass settings directly to the sparkConf that do not use the "spark." prefix "as-is", use the "passthrough" section.`
`596`	`600`
`597`	`601`	`spark.context-settings {`