Update date on proxy reference.

docs.md

@@ -19,7 +19,7 @@ Documentation
 |20-May-2017|[html](/doc/dev47/xrd_config.htm) [pdf](/doc/dev47/xrd_config.pdf)           |Xrd/XRootd Configuration Reference (4.7)                            |
 |18-Oct-2015|[html](/doc/dev41/ofs_config.htm) [pdf](/doc/dev41/ofs_config.pdf)        |Open File System & Open Storage System Configuration Reference (4.x)      |
 |11-Jan-2017|[html](/doc/dev46/pss_config.htm) [pdf](/doc/dev46/pss_config.pdf)        |Proxy Storage Services Configuration Reference (4.6)    |
-|26-Jun-2017|[html](/doc/dev47/pss_config.htm) [pdf](/doc/dev47/pss_config.pdf)        |Proxy Storage Services Configuration Reference (4.7)    |
+|28-Jun-2017|[html](/doc/dev47/pss_config.htm) [pdf](/doc/dev47/pss_config.pdf)        |Proxy Storage Services Configuration Reference (4.7)    |
 |21-Oct-2016|[html](/doc/dev45/cms_config.htm) [pdf](/doc/dev45/cms_config.pdf)        |Cluster Management Service Configuration Reference (4.4)                    |
 |09-Oct-2016|[html](/doc/dev45/sec_config.htm) [pdf](/doc/dev45/sec_config.pdf)        |Security Configuration Reference (4.5)                                         |
 |07-Apr-2017|[html](/doc/dev47/sec_config.htm) [pdf](/doc/dev47/sec_config.pdf)        |Security Configuration Reference (4.7)                                         |