Basic http debug UI and bug updates

1.18 introduces a few minor changes. Biggest change of note is a webui enabled by default on the example server/proxy.

• Make discovery of nobody's group more robust (#177)
• Add an option for an extremely minimal web debug server (#190)
• Enable dependabot and update various dependences

Fix fdb conf read CLI code

fix client code for fdb conf so reads emit output (#178)

* Fix fdb conf read so it prints output

* Add newline

Add DNS support

Adds convenience command to issue DNS queries (#175)

Fix https://github.com/Snowflake-Labs/sansshell/issues/167

v1.16.0: Make error reporting from a subprocess more consistent. (#173)

Add a new Packages method - Cleanup. For yum this runs yum-complete-transaction --cleanup-only which may be needed if updating the sansshell package using sansshell.

Also fix error reporting from package installation so its clearer on failures.

v1.15.1: Don't skip processing for internal commands always. (#172)

We can only do this when they are in the first couple positions. Otherwise this becomes problematic once they get passed into a subcommand+subcommand where a nil Conn == panic.

v1.15.0: Add service enable/disable support and tests (#171)

Add support for service enable/disable

v1.14.3: Add utilities for 1:1 (#168)

exec a remote command
remove a remote file

v1.14.2: Start providing helper functions to wrap common 1:1 functions: (#166)

Read a file
Write a file
Copy a file
Restart a service.

N target varieties likely need to be written directly as handling N streams of output back is very implementation dependent and likely not worth abstracting.

v1.14.1

Fix Recv() on ProxyConn not working for non OneMany case

Update to go 1.19

v1.14.0

Line up comments, fix typo (#163)