[7.3][docs] Documentation backports (#2688)

Author: bmorelli25

docs/configuration-rum.asciidoc

@@ -13,6 +13,7 @@ apm-server.rum.event_rate.lru_size: 1000
 apm-server.rum.allow_origins: ['*']
 apm-server.rum.library_pattern: "node_modules|bower_components|~"
 apm-server.rum.exclude_from_grouping: "^/webpack"
+apm-server.rum.source_mapping.enabled: true
 apm-server.rum.source_mapping.cache.expiration: 5m
 apm-server.rum.source_mapping.index_pattern: "apm-*-sourcemap*"
 ----
@@ -64,6 +65,12 @@ RegExp to be matched against a stacktrace frame's `file_name`.
 If the RegExp matches, the stacktrace frame is excluded from being used for calculating error groups.
 The default pattern excludes stacktrace frames that have a filename starting with `/webpack`.
 
+[[config-sourcemapping-enabled]]
+[float]
+==== `source_mapping.enabled`
+Used to enable/disable <<sourcemaps,sourcemapping>> for RUM events.
+Defaults to `true`.
+
 [[config-sourcemapping-elasticsearch]]
 [float]
 ==== `source_mapping.elasticsearch`

docs/guide/agent-server-compatibility.asciidoc

@@ -16,17 +16,18 @@ The chart below outlines the compatibility between different versions of the APM
 
 // .NET
 .1+|**.NET Agent**
-|`1.0.0-beta1` |>= `6.5`
+|`1.x` |>= `6.5`
 
 // Node
 .2+|**Node.js Agent**
 |`1.x` |`6.2`-`6.x`
 |`2.x` |>= `6.5`
 
 // Python
-.2+|**Python Agent**
+.3+|**Python Agent**
 |`2.x`, `3.x` |`6.2`-`6.x`
 |`4.x` |>= `6.5`
+|`5.x` |>= `6.6`
 
 // Ruby
 .2+|**Ruby Agent**

docs/rum.asciidoc

@@ -15,7 +15,9 @@ A source map library helps by mapping the minified files back to the the origina
 
 APM Server provides a <<sourcemap-api,Source Map API>> for uploading source maps.
 
-Source maps are then automatically applied to all incoming transactions and errors.
+By default, <<config-sourcemapping-enabled>> is set to `true`.
+This means if a source map has previously been uploaded,
+source mapping will automatically be applied all incoming transactions and errors.
 
 Source maps are cached in memory for as long as the <<rum-sourcemap-cache,cache expiration>> setting indicates.
 

docs/version.asciidoc

@@ -1,3 +1,8 @@
+// stack-version can be:    7.0.1, 8.0.0-alpha1, 8.1.0, etc.
+// major-version can be:    8.x, 7.x, 6.x, etc.
+// doc-branch can be:       master, 8.0, 8.1, etc.
+// release-state is only:   released | prerelease | unreleased
+
 :stack-version: 7.3.1
 :major-version: 7.x
 :doc-branch: 7.3