[docs] Add FAQ question related to the failure of SARL Eclipse launch…

… on MacOS X.

Thanks to ThomasFarrenkopf for the finding.

see #1022

Signed-off-by: Stéphane Galland <galland@arakhne.org>

README.adoc

@@ -186,6 +186,7 @@ Please read the link:./CONTRIBUTING.adoc[guidelines for contributors].
 * image:https://avatars.githubusercontent.com/klmp200[width="50px",link=https://github.com/klmp200] Antoine Bartuccio, fireworks and Sierpinski fractal examples.
 * image:https://avatars.githubusercontent.com/gb96[width="50px",link=https://github.com/gb96] Greg Bowering, fixes for localization support within the fireworks example.
 * image:https://avatars.githubusercontent.com/m-ezzat[width="50px",link=https://github.com/m-ezzat] Mohamed Ezzat, code cleaning and optimization.
+* image:https://avatars.githubusercontent.com/ThomasFarrenkopf[width="50px",link=https://github.com/ThomasFarrenkopf] Thomas Farrenkopf, documentation contributor.
 * image:https://avatars.githubusercontent.com/jgfoster[width="50px",link=https://github.com/jgfoster] James Foster, documentation contributor.
 * image:https://avatars.githubusercontent.com/gallandarakhneorg[width="50px",link=https://github.com/gallandarakhneorg] link:http://www.ciad-lab.fr/author-10836/[Stéphane GALLAND], founder, original and active author.
 * image:https://avatars.githubusercontent.com/ngaud[width="50px",link=https://github.com/ngaud] link:http://www.ciad-lab.fr/author-10834/[Nicolas GAUD], founder, original and active author.

docs/io.sarl.docs.markdown/src/main/documentation/faq/GeneralFAQ.md

@@ -212,6 +212,18 @@ Nevertheless, the two most reported causes of avoidance of the SARL Eclipse laun
    * install the JDK [:sarl-run.min.jdk.version!], and configuring your operating system to use it by default; or
    * force the SARL product to use the JDK [:sarl-run.min.jdk.version!] by editing the `eclipse-sarl.ini` file into the folder of the SARL IDE. Add the following parameter on a new line: `-vm path`, where `path` is the path to the binary file `javaw` or `java` of at least the JDK [:sarl-run.min.jdk.version!].
 [:Fact:]("[:sarl-run.min.jdk.version!]".shouldBeAtLeastJava)
+2. The Gatekeeper of MacOS X blocks the launch of the SARL Eclipse, because Gatekeeper considers SARL Eclipse as unstable. You could confirm this problem by looking into your `system.log` file and searching for a message that looks like:
+
+```
+(application.io.sarl.lang.product.72020573.72020798[78958]): removing service since it exited with consistent failure - OS_REASON_EXEC | Gatekeeper policy blocked execution
+```
+
+On order to enable Gatekeper to enable the SARL Eclipse launch, you should type on the Terminal the following command:
+```
+sudo xattr -rd com.apple.quarantine Eclipse.app
+```
+
+Where `Eclipse.app` is the name of the SARL Eclipse application on MacOS X.
 
 
 ### Why does the SARL product launch but not contain any features related to SARL?

pom.xml

@@ -237,6 +237,13 @@
 				<role>Code cleaning and optimization</role>
 			</roles>
 		</contributor>
+		<contributor>
+			<name>Thomas Farrenkopf</name>
+			<url>https://github.com/ThomasFarrenkopf</url>
+			<roles>
+				<role>Documentation Contributor</role>
+			</roles>
+		</contributor>
 		<contributor>
 			<name>James Foster</name>
 			<email>github@jgfoster.net</email>