and "post-xfer exec". These allow a command to be specified on a
per-module basis that will be run before and/or after a daemon-mode
transfer.
+
+ INTERNAL:
+
+ - Some buffer sizes were expanded a bit, particularly on systems where
+ MAXPATHLEN is overly small (e.g. cygwin).
+
+ - If io_printf() tries to format more data than fits in the buffer, exit
+ with an error instead of transmitting a truncated buffer.