Enhance logging

[mnhauke]

FTP: log requested files, even if those could not be found
FTP: log requested files, even if those aren't accessable
(insufficient permissions, ...)
TFTP: Move loglevel for RRQ|WRQ|DATA from DBG to INFO

[troglobit]

Looks good to me. What are your thoughts on using LOG() instead of INFO() to get these log messages sent to syslogd by default, rather than having to start with uftpd -l info?

[troglobit]

Also, for future reference, if you have "Fix #28: ..." in the title of your commit message, or anywhere else for that matter, issue #28 would be automatically closed when I merge the PR :)

[mnhauke]

Looks good to me. What are your thoughts on using LOG() instead of INFO() to get these log messages sent to syslogd by default, rather than having to start with uftpd -l info?

For FTP it seems that almost nothing is logged with loglevel notice (default).
For TFTP only some errors are logged with loglevel notice.
So I guess loglevel info would still fit best.

I personally always use loglevel info since loglevel notice is a bit too less verbose.

[troglobit]

That was sort of my point. Changing INFO() to LOG() in your patch we'd get these messages by default. My reasoning is that you may not be alone in wanting these messages logged, by default.

[mnhauke]

Got it.
I have updated the PR.

[troglobit]

Thank you! :)

I squashed your second commit 'blubb' into the first and added another change to the log level to further increase verbosity of common operations.