[QA] Two new virus scanners added to files_antivirus

[jnweiger]

WHAT Needs to be Documented?

diff --git a/README.md b/README.md
index 5fa771f..1d1b2c1 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,24 @@ NOTE: The older versions of KAV did not send back the virus/infection name in an
 In v2.0.0 the header to transport the virus can be configured. Default: No header is sent.
 see https://support.kaspersky.com/ScanEngine/1.0/en-US/201214.htm
 
+
+### Run with FortiSandbox in ICAP Mode
+
+Select 'Fortinet' from the dropdown.
+
+The request service for FortiSandbox has to be set to 'respmod' and the response header to 'X-Virus-Name'.
+
+Fortinet privides some Demoinstances of the FortiSandbox, please have a look at the [productpage](https://www.fortinet.com/de/products/sandbox/fortisandbox) from Fortinet.
+
+
+### Run with McAfee Web Gateway 10.x and higher in ICAP Mode
+
+Select 'McAfee Web Gateway 10.x and higher' from the dropdown.
+
+The request service for McAfee has to be set to 'respmod' and the response header to 'X-Virus-Name'.
+
+McAfee provides Demoversions with limited Runtime for evaluation purposes. Have a look at [the McAfee Webpage](https://www.skyhighsecurity.com/en-us/products/secure-web-gateway.html) for the Web Gateway.
+

WHERE Does This Need To Be Documented (Link)?

https://github.com/owncloud/docs-server/edit/master/modules/admin_manual/pages/configuration/server/virus-scanner-support.adoc

WHY Should This Change Be Made?

new features

(Optional) What Type Of Content Change Is This?

• New Content Addition
• Old Content Deprecation
• Existing Content Simplification
• Bug Fix to Existing Content

(Optional) Which Manual Does This Relate To?

• Admin Manual
• Developer Manual
• User Manual
• Android
• iOS
• Branded Clients
• Desktop Client
• Other

Backports to 10.9 and 10.10 please

[mmattel]

@jnweiger I just have uploaded the final rendered version to staging.

[jnweiger]

files_antivirus-1.1.0 with the two new scanner settings is being released today.