MXS-2253 Update general documentation regarding durations

Documentation/Changelog.md

@@ -6,6 +6,7 @@
 * Names can no longer contain whitespace.
 * Servers can now be drained.
 * The servers of a service can now be defined using a monitor.
+* Durations can now be specified as hours, minutes, seconds or milliseconds.
 
 For more details, please refer to:
 

Documentation/Getting-Started/Configuration-Guide.md

@@ -219,6 +219,28 @@ max_size=1000000M
 max_size=1000G
 max_size=1T
 ```
+
+#### Durations
+
+A number denoting a duration can be suffixed by one of the case-insensitive
+suffixes `h`, `m`, `s` and `ms`, for specifying durations in hours, minutes,
+seconds and milliseconds, respectively.
+
+For instance, the following entries
+```
+soft_ttl=1h
+soft_ttl=60m
+soft_ttl=3600s
+soft_ttl=3600000ms
+```
+are equivalent.
+
+Note that if an explicit unit is not specified, then it is specific to the
+configuration parameter whether the duration is interpreted as seconds or
+milliseconds.
+
+_Not_ providing an explicit unit has been deprecated in MaxScale 2.4.
+
 #### Regular Expressions
 
 When a regular expression (regex) parameter is accepted, the pattern string

Documentation/Release-Notes/MaxScale-2.4.0-Release-Notes.md

@@ -76,6 +76,18 @@ In this case, the servers of the service will be defined by the
 referred to monitor. Note that the parameters `servers` and `cluster`
 are mutually exclusive.
 
+### Durations
+
+In the MaxScale configuration file, durations can now be suffixed with
+`h`, `m`, `s` or `ms` to indicate that the duration is specified as
+hours, minutes, seconds or milliseconds.
+
+Please see the
+[configuration guide](../Getting-Started/Configuration-Guide.md#durations)
+for details.
+
+_Not_ providing an explicit unit has been deprecated in MaxScale 2.4.
+
 ## Bug fixes
 
 [Here is a list of bugs fixed in MaxScale 2.4.0.](https://jira.mariadb.org/issues/?jql=project%20%3D%20MXS%20AND%20issuetype%20%3D%20Bug%20AND%20status%20%3D%20Closed%20AND%20fixVersion%20%3D%202.4.0)

Documentation/Upgrading/Upgrading-To-MaxScale-2.4.md

@@ -44,3 +44,16 @@ must be changed, for instance, to
 ...
 servers=MyServer
 ```
+
+## Durations
+
+Durations can now be specified using one of the suffixes `h`, `m`, `s`
+and `ms` for specifying durations in hours, minutes, seconds and
+milliseconds, respectively.
+
+_Not_ providing an explicit unit has been deprecated in MaxScale 2.4,
+so it is adviseable to add suffixes to durations. For instance,
+```
+some_param=60s
+some_param=60000ms
+```