[gssapi/gssproxy] 8d865b: Make syslog of call status configurable

[Robbie Harwood]

Branch: refs/heads/main
  Home:   https://github.com/gssapi/gssproxy
  Commit: 8d865bdecf7f2aea4514bec9bd31001b96aef6d5
      https://github.com/gssapi/gssproxy/commit/8d865bdecf7f2aea4514bec9bd31001b96...
  Author: Robbie Harwood 
  Date:   2020-08-31 (Mon, 31 Aug 2020)

Changed paths:
    M man/gssproxy.8.xml
    M man/gssproxy.conf.5.xml
    M src/gp_config.c
    M src/gp_log.c
    M src/gp_log.h
    M src/gssproxy.c

Log Message:
  -----------
  Make syslog of call status configurable

Add a parameter (syslog_status) to configuration and
CLI (--syslog-status).  This logs the results of GSSAPI calls at
LOG_DEBUG.  Typically these calls resemble:

gssproxy[28914]: (OID: { 1 2 840 113554 1 2 2 }) Unspecified GSS
    failure.  Minor code may provide more information, No credentials
    cache found

Since these messages worry some admins, turn them off by default.

Signed-off-by: Robbie Harwood