Carry out the call history section directives

A call history file is built from years of logs, so its section and
state columns carry old names, and the file says at the top what to do
about that. The four lines that say it were read and passed over.

All four are now carried out, in N1MM's order: !!MapOnSection!! stores
the old Ontario sections as ON, !!ValidateArrlSection!! drops a section
that is not one of N1MM's, !!GTA2GH_NT2TER!! stores GTA as GH and NT as
TER, and !!Validate50State!! keeps a state, turns a section into the
state it is in, or drops the value.

The section list is the one N1MM's call history reader validates
against, which is not the list its entry window offers: it holds the
retired GTA and NT, and leaves out ON. It sits beside the reader in
Nonemm.Core rather than with the contest lists, which are the entry
window's.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RoGtneMQaz4M9w7Kk49AVD

docs/unfinished.md

@@ -29,12 +29,6 @@ of an SO2R station cannot call CQ by voice. Alternating CQ therefore works on CW
 only, though nothing in it is CW-specific: a voice keyer that reports when the
 recording has finished would drive it as it stands.
 
-**Call history: the section-validating directives.** `!!Validate50State!!`,
-`!!ValidateArrlSection!!`, `!!MapOnSection!!` and `!!GTA2GH_NT2TER!!` are read
-and passed over. Acting on them means holding N1MM's section lists and its
-rules about which sections are retired, and getting that wrong throws away good
-data. The file is read without them.
-
 **The QTC window transmits on CW only.** The header, the lines, the QRV, the TU
 and the again messages go out through the keyer, with N1MM's messages and
 N1MM's defaults. Nothing goes out on SSB or RTTY: N1MM plays four recordings on