Changes order of members in sbbs_t... all libs need rebuilding.

example, [telnet|rlogin] would set the socket options for either telnet or
rlogin servers, while [telnet] would set the socket options only for the telnet
server.

(replacing sockopts.cfg).

ftp_put() now immediately fails if the file doesn't exist.
ftp_put() now uses a case-insensitive file existence check/case fix.

unused (passing NULL).

Makes the poll/yield loops unnecessary.

- fixes problem with detecting bad/blank DNS server IP address.

server before sending STOR command.

server before sending LIST/RETR command.

struct before calling bind() which caused intermittent failures on FreeBSD.

that keeps proper track of the number of open socket descriptors.

connection BEFORE the LIST/RETR/STOR command is sent.

when telnet server network interface is set to 0 (<any>).

This should fix the problem in the QNET-FTP module timing-out waiting for the BBS to create the QWK packet.