conf: bump to next version 4.16

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
diff --git a/source/_global.rst b/source/_global.rst
index 0af4614..9dd1453 100644
--- a/source/_global.rst
+++ b/source/_global.rst
@@ -25,19 +25,19 @@
 
 .. Latest version systemvm template name
 
-.. |sysvm64-version|     replace:: 4.15.0
-.. |sysvm64-name-xen|    replace:: systemvm-xenserver-4.15.0
-.. |sysvm64-name-kvm|    replace:: systemvm-kvm-4.15.0
-.. |sysvm64-name-vmware| replace:: systemvm-vmware-4.15.0
-.. |sysvm64-name-hyperv| replace:: systemvm-hyperv-4.15.0
-.. |sysvm64-name-ovm|    replace:: systemvm-ovm-4.15.0
+.. |sysvm64-version|     replace:: 4.16.0
+.. |sysvm64-name-xen|    replace:: systemvm-xenserver-4.16.0
+.. |sysvm64-name-kvm|    replace:: systemvm-kvm-4.16.0
+.. |sysvm64-name-vmware| replace:: systemvm-vmware-4.16.0
+.. |sysvm64-name-hyperv| replace:: systemvm-hyperv-4.16.0
+.. |sysvm64-name-ovm|    replace:: systemvm-ovm-4.16.0
 
 .. Latest version systemvm template URL
-.. |sysvm64-url-xen|    replace:: http://download.cloudstack.org/systemvm/4.15/systemvmtemplate-4.15.0-xen.vhd.bz2
-.. |sysvm64-url-kvm|    replace:: http://download.cloudstack.org/systemvm/4.15/systemvmtemplate-4.15.0-kvm.qcow2.bz2
-.. |sysvm64-url-vmware| replace:: http://download.cloudstack.org/systemvm/4.15/systemvmtemplate-4.15.0-vmware.ova
-.. |sysvm64-url-hyperv| replace:: http://download.cloudstack.org/systemvm/4.15/systemvmtemplate-4.15.0-hyperv.vhd.zip
-.. |sysvm64-url-ovm|    replace:: http://download.cloudstack.org/systemvm/4.15/systemvmtemplate-4.15.0-ovm.raw.bz2
+.. |sysvm64-url-xen|    replace:: http://download.cloudstack.org/systemvm/4.16/systemvmtemplate-4.16.0-xen.vhd.bz2
+.. |sysvm64-url-kvm|    replace:: http://download.cloudstack.org/systemvm/4.16/systemvmtemplate-4.16.0-kvm.qcow2.bz2
+.. |sysvm64-url-vmware| replace:: http://download.cloudstack.org/systemvm/4.16/systemvmtemplate-4.16.0-vmware.ova
+.. |sysvm64-url-hyperv| replace:: http://download.cloudstack.org/systemvm/4.16/systemvmtemplate-4.16.0-hyperv.vhd.zip
+.. |sysvm64-url-ovm|    replace:: http://download.cloudstack.org/systemvm/4.16/systemvmtemplate-4.16.0-ovm.raw.bz2
 
 .. Version specific: 4.5 systemvm template URL
 .. |acs45-sysvm64-url-xen|    replace:: http://download.cloudstack.org/systemvm/4.5/systemvm64template-4.5-xen.vhd.bz2
diff --git a/source/conf.py b/source/conf.py
index 325e655..55fb01d 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -20,13 +20,13 @@
 # -- Project information -----------------------------------------------------
 
 project = 'Apache CloudStack'
-copyright = '2012-2020, Apache Foundation'
+copyright = '2012-2021, Apache Foundation'
 author = 'Apache CloudStack Project'
 
 # The short X.Y version
-version = '4.15'
+version = '4.16'
 # The full version, including alpha/beta/rc tags
-release = '4.15.0.0'
+release = '4.16.0.0'
 
 rst_epilog = """
 .. include:: /_global.rst