So Clang-FreeBSD was warning (in compiles of scfg/scfg*.c by Deuce):
result of comparison of constant 100000 with expression of type 'uint16_t'
(aka 'unsigned short') is always true

Why? Cause a uint16_t's max value is 65535 (less than 100000). Sure we could
have just lowered the UIFC max number of config items to 65535, but that would
have been too easy. And why are these compared-with values of type uint16_t to
begin with? Because most ctrl/*.cnf lists (of configuration items) were
limited to 65535 entries cause ... 16-bit DOS, historically. Now that *.cnf
files aren't used, we could just increase these scfg_t.*_total type sizes from
16 to 32-bits, yeah? The result is this commit.

I went to (signed) int so we could still keep -1 as the special illegal
sub/dir num value (e.g. INVALID_SUB, which is sometimes used to indicate the
email message base). Theoretically, 2 billion configuration items could be
supported in these lists, but SCFG will limit you to 100000 anyway. So there's
a whole lot of s/uint/int in this commit.

I'd be very surprised if this doesn't result in some new GCC/Clang warnings,
but at least the old "comparison of constant 100000" warnings are now gone!

Still needs updates in services_thread(), CGI stuff in websrvr.c,
and sbbs_t::external()

support to the JS API.

read buffer out-of-band offset access.

New Features:
- Multiple bindings for each service
  Use comma-separated interfaces on Interface= lines in the ini file.
  Default is now "0.0.0.0,::"
- IPv6 support
- TLS support for the webserver and (non-static) services
  New TLS option in services.ini (ie: Options=TLS)
- Decrease LEN_SCAN_CMD to 35 chars, increase the CID field to 45 chars,
  and rename the MAIL_CMD string to IPADDR.  I think this frees up the
  note field for SysOp use.

by properly const-ifying the appropriate functions and variables.

Not yet tested on Win32

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.