[SCM-953] Deprecate commercial and CVS providers

This closes #126
diff --git a/src/site/apt/index.apt b/src/site/apt/index.apt
index f2c9c11..89ed70a 100644
--- a/src/site/apt/index.apt
+++ b/src/site/apt/index.apt
@@ -40,3 +40,19 @@
   * {{{./maven-scm-plugin}<<<maven-scm-plugin>>>}}: a Maven plugin, where each SCM command is implemented as a plugin goal,
 
   * {{{./maven-scm-client}<<<maven-scm-client>>>}}: a simple SCM command line tool.
+
+Deprecation Notice
+
+  The following SCM providers are deprecated and will be removed in version 2.0.0:
+
+  * maven-scm-provider-accurev
+  * maven-scm-provider-bazaar
+  * maven-scm-provider-clearcase
+  * maven-scm-provider-integrity
+  * maven-scm-provider-jazz
+  * maven-scm-provider-perforce
+  * maven-scm-provider-starteam
+  * maven-scm-provider-synergy
+  * maven-scm-provider-tfs
+  * maven-scm-provider-vss
+  * maven-scm-providers-cvs