Log Message:
Update net/freerdp2 to version 2.3.2

Changes between 2.1.2 and 2.2.0 (newer changes not preset in ChangeLog)

# 2020-07-20 Version 2.2.0

Important notes:
* CVE-2020-15103 - Integer overflow due to missing input sanitation in rdpegfx \ 
channel

Noteworty changes:
* fix: memory leak in nsc
* urbdrc
  * some fixes and improvements
* build
  *  use cmake to detect getlogin_r
  * improve asan checks/detection
* server/proxy
  * new: support for heartbeats
  * new: support for rail handshake ex flags
  * fix: possible race condition with redirects

Fixed issues:
* #6263 Sound & mic - filter GSM codec for microphone redirection
* #6335: windows client title length
* #6370 - "Alternate Secondary Drawing Order UNKNOWN"
* #6298 - remoteapp with dialog is disconnecting when it loses focus
* #6299 - v2.1.2: Can't connect to Windows7