On windows one must add 15 backslashes for each single backslash in (windows style)
property value.  (see https://issues.redhat.com/browse/WFCORE-5982)

There is no documentation that describes the usages cases.
As long as the property value is in unix-style format there is no issue,
however if the user is (auto-generating) the value in maven then the user
must convert all window's formated text to unix format or windows format. 
(e.g.

  <propertyfile file="${basedir}/target/my-cli.properties">
    <entry key="testResourcesDir" value="${basedir}/target/resources/test.truststore"/>
  </propertyfile>

)

On windows text "${basedir}/target/my-cli.properties" MUST be converted to 
WINDOW's format because it is being used to create a new file.  Text 
"${basedir}/target/resources/test.truststore" must be converted to be fully
unix format (e.g. ${basedir} must be converted) or the full string must be
converted to window's format, in which case all '/' must be replaced with '\'
and each '\' MUST have 15 more '\' prefixed to it.  An initial testResourcesDir
value, A:\home\me\project/target/resources/test.truststore must be converted
to A:\\\\\\\\\\\\\\\\home\\\\\\\\\\\\\\\\me\\\\\\\\\\\\\\\\project\\\\\\\\\\\\\\\\target\\\\\\\\\\\\\\\\resources\\\\\\\\\\\\\\\\test.truststore

This is because wildfly-maven-plugin strips half the '\' when it reads the property
value.  It writes value to the cmd-line like this 
  -DtestResourcesDir=A:\\\\\\\\home\\\\\\\\me\\\\\\\\project\\\\\\\\target\\\\\\\\resources\\\\\\\\test.truststore

Widfly CLI strips half the '\' when it reads the runtime property which then is
testResourcesDir=A:\\\\home\\\\me\\\\\project\\\\target\\\\resources\\\\test.truststore
Internally CLI must do one more stream read because another set of backslashes
are removed to produce a final cmd path, A:\\home\\me\\\project\\target\\resources
test.truststore

A secondary issue with the handling of property values is window's formated text 
within quotation marks is always altered.  It is expected that text within
quotation marks is not altered.

Project https://github.com/rsearls/cwbug.git is provided to demonstrate the issue.