Added changelog for 2.1.2

ChangeLog

@@ -1,3 +1,26 @@
+# 2020-06-22  Version 2.1.2
+
+Important notes:
+* CVE-2020-4033 Out of bound read in RLEDECOMPRESS
+* CVE-2020-4031 Use-After-Free in gdi_SelectObject
+* CVE-2020-4032 Integer casting vulnerability in `update_recv_secondary_order`
+* CVE-2020-4030 OOB read in `TrioParse`
+* CVE-2020-11099 OOB Read in license_read_new_or_upgrade_license_packet
+* CVE-2020-11098 Out-of-bound read in glyph_cache_put
+* CVE-2020-11097 OOB read in ntlm_av_pair_get
+* CVE-2020-11095 Global OOB read in update_recv_primary_order
+* CVE-2020-11096 Global OOB read in update_read_cache_bitmap_v3_order
+* Gateway RPC fixes for windows
+* Fixed resource fee race resulting in double free in USB redirection
+* Fixed wayland client crashes
+* Fixed X11 client mouse mapping issues (X11 mapping on/off)
+* Some proxy related improvements (capture module)
+* Code cleanup (use getlogin_r, ...)
+
+For a complete and detailed change log since the last release candidate run:
+git log 2.1.1..2.1.2
+
+
 # 2020-05-20  Version 2.1.1
 
 Important notes: