[gssapi/gssproxy] 7b16d2: Release version 0.8.3

[Robbie Harwood]

Branch: refs/heads/master
  Home:   https://github.com/gssapi/gssproxy
  Commit: 7b16d2387ae649698e8181c5888696ec8decc379
      https://github.com/gssapi/gssproxy/commit/7b16d2387ae649698e8181c5888696ec8d...
  Author: Robbie Harwood 
  Date:   2020-04-17 (Fri, 17 Apr 2020)

Changed paths:
    A docs/Releases/v0.8.3.md
    M version.m4

Log Message:
  -----------
  Release version 0.8.3

Signed-off-by: Robbie Harwood