Update the xrd/xrootd reference.

Clarify the downloads page and remove references to SLC5.

dload.md

@@ -85,23 +85,23 @@ Yum repositories
 ----------------
 
 We build RPMs for Scientific Linux and make them available through YUM. There
-are two types of repositories: a **stable** one - containing only stable
-releases, and a **testing** one - serving also release candidates. The repo
+are three types of repositories: a **stable** one - containing only stable
+releases, a **testing** one - serving release candidates, and a **future**
+one which is the nightly build of the master branch. The repo
 files for /etc/yum.repos.d are available below:
 
 * Stable: 
-  [xrootd-stable-slc5.repo](/binaries/xrootd-stable-slc5.repo),
   [xrootd-stable-slc6.repo](/binaries/xrootd-stable-slc6.repo),
   [xrootd-stable-slc7.repo](/binaries/xrootd-stable-slc7.repo),
   [xrootd-stable-slc8.repo](/binaries/xrootd-stable-slc8.repo)
 * Testing:
-  [xrootd-testing-slc5.repo](/binaries/xrootd-testing-slc5.repo),
   [xrootd-testing-slc6.repo](/binaries/xrootd-testing-slc6.repo),
   [xrootd-testing-slc7.repo](/binaries/xrootd-testing-slc7.repo),
   [xrootd-testing-slc8.repo](/binaries/xrootd-testing-slc8.repo)
-* Experimental
+* Future:
   [xrootd-experimental-slc6.repo](/binaries/xrootd-experimental-slc6.repo),
   [xrootd-experimental-slc7.repo](/binaries/xrootd-experimental-slc7.repo)
+  [xrootd-experimental-slc8.repo](/binaries/xrootd-experimental-slc8.repo)
 * Ceph:
   [xrootd-ceph-slc7.repo](/binaries/xrootd-ceph-slc7.repo)
 

docs.md

@@ -15,7 +15,7 @@ Documentation
 |:---------:|:----------------------------------------------------------------------:|------------------------------------------------------------------------------|
 |27-Jul-2018|[html](/doc/dev49/Syntax_config.htm) [pdf](/doc/dev49/Syntax_config.pdf)  |Configuration File Syntax (4.9)                                               |
 |13-Jun-2021|[html](/doc/dev53/xrd_config.htm) [pdf](/doc/dev53/xrd_config.pdf)        |Xrd/XRootD Configuration Reference (5.3)                            |
-|02-Aug-2021|[html](/doc/dev54/xrd_config.htm) [pdf](/doc/dev54/xrd_config.pdf)        |Xrd/XRootD Configuration Reference (5.4)                            |
+|22-Nov-2021|[html](/doc/dev54/xrd_config.htm) [pdf](/doc/dev54/xrd_config.pdf)        |Xrd/XRootD Configuration Reference (5.4)                            |
 |25-Jun-2021|[html](/doc/dev53/ofs_config.htm) [pdf](/doc/dev53/ofs_config.pdf)        |Open File System & Open Storage System Configuration Reference (5.3)      |
 |30-Jul-2021|[html](/doc/dev54/ofs_config.htm) [pdf](/doc/dev54/ofs_config.pdf)        |Open File System & Open Storage System Configuration Reference (5.4)      |
 |25-Jun-2021|[html](/doc/dev53/pss_config.htm) [pdf](/doc/dev53/pss_config.pdf)        |Proxy Storage Services Configuration Reference (5.3)    |