Also resolved some 32 vs 64-bit 'long' issues/ambiguities that have long-remained. :-)

This commit also removes logon.lst file support.

There's a TODO block remaining in js_user.c for setting portions of a user's birthdate (e.g. just the year or month or day).

Initial support for read user records from user.tab
Add verification phase to upgrade program

Section suffix is the decimal ASCII value, not the character itself.
Fix issue #440 as reported by Nelgin

not just 'settings'

Fix issue 439. Thanks Nelgin!

'execution_ars' not 'run_ars'.

Cut the load/parse time of large (e.g. 1MB) .ini files in half.

Performance optimization: each section becomes its own separate (named) string list, so repeated searches through all the lines (including keys/values) are eliminated.

This optimization resulted in a 50% reduction in time to load/parse large .ini files into memory.

An additional 10% improvement was observed by freeing/nulling section names as they were consumed. Setting them to blank strings was also tried (without immediate freeing), but no performance improvement was observed.

For use with some new ini_file functions.

Some way for the sysop to specify their defaults would be preferable.

Use 'inipath' instead.

Fixes msgs.ini disappearing issue as reported by Nelgin

format ‘%lX’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘uint’

Resolve warnings and issues with ambiguity around the size of a long int.

Just to help resolve some warnings in scfg*.c

long is the one type that a different size between the supported 32-bit and 64-bit platforms, avoid its use.

Don't use long types in parameters to/return types of non-long functions (e.g. *Integer(), *Bytes(), *HexInt()): use int/uint instead. long is the one type that is a different size between the supported 32-bit and 64-bit target platforms, so avoid its use here.
*LongInt() functions now accept/return long, not ulong.
*ShortInt() functions accept/return short, not ushort.
Added *UInteger, *UShortInt(), *ULongInt() functions for dealing with unsigned integer values, specifically.
Add bit-width-specific aliases to integer value functions: *Int16, *UInt16, *Int32, and *UInt32

Some re-arranging of lines to group section keys together, logically.

Fixed typos with "newuser" vs. "nweuser" section naming.

Need to nullify the xpms after destroying/freeing (as is done in other
servers already).