Created msgbase.cfg.index (as 'undefined').

(different from void).

needs exclusive access to the directory).

Only save .ini settings (not registry) when completing config wizard.
Don't back-up any .cnf files when completing config wizard.

(e.g. cmd.exe for NT, sh/bash for Unix, etc).

Check for mismatches against all index fields.
Beautified/clarified index mismatch error messages.

smb_init_idx().

used by smb_addmsg() and other higher level functions).

set (previously, TG_CTRLKEYS only worked if TG_LINEMODE was set).

Calculate and display total messages imported per sub (and msgs/sec).

"leave" (signifying Synchronet systems).

output from qwktomsg() to get to event log).

for crc32 history calculation. The entire message body text passed-in is used
for hash calculations and storage in the msgbase. Should this function trim off
trailing white-space before storing (currently handled in higher level
functions)?

Eliminated redundant strdup() call in smb_hashstr()/strip_chars().
Eliminated redundant memset() call in smb_getmsgidx_by_hash().

stream is already open.

for Synchronet QWKnet nodes (include VIA/TZ/MSGID kludges and Ctrl-A codes,
do not include index or control files).

why CRC history (.sch) files aren't being updated now and why some BODY_TEXT
hashes aren't be stored.