environment logged by debug3 (-vvv)

[Eric Melville]

When using debug3 one gets all kinds of lovely environment information -
debug3: Ignored env TMPDIR
debug3: Ignored env TERM_PROGRAM_VERSION
debug3: Ignored env Apple_PubSub_Socket_Render
debug3: Ignored env __CHECKFIX1436934
debug3: Ignored env TERM_PROGRAM
debug3: Ignored env TERM_SESSION_ID
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env TERM
debug3: Ignored env DISPLAY
debug3: Ignored env __CF_USER_TEXT_ENCODING
debug3: Ignored env SHELL
debug3: Ignored env HOME
debug3: Ignored env LOGNAME
debug3: Ignored env USER
debug3: Ignored env PATH
debug3: Ignored env SHLVL
debug3: Ignored env PWD
debug3: Ignored env OLDPWD
debug3: Ignored env _

However, it appears to be limited to telling the user which variables are being
ignored. It would be useful to see what variables are impacting the session as
well, such as KRB5CCNAME and any X11/DISPLAY related variables, spelled out, as
well.

Thanks!