Add support for serving files from a custom path, not ftp user's $HOME

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Minor change in DBG() message and add gtags files to .gitignore

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Add support for RFC 2348, negotiate block size with client => speedup xfers

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Minor cleanups and log to stderr when in foreground AND debug mode

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
Update documentation and freshen up README.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>