Make add always reset the country

Before, add reset the country only when adding a player or a visitor.
When adding a deity or deleting a country, it set just nat_cnam,
nat_pnam and nat_state.  Has always been that way.

Because of that, a newly minted deity country could inherit all kinds
of crap from a previous user of its country number: origin, realms,
relations, telegrams, ...  Harmless if the country number has never
been used before, which is how add is generally used.

When adding a deity country, initial levels (start_education, ...) now
apply, relations start NEUTRAL instead of AT_WAR, and the usual
initial nation flags are set.

Reset on delete as well, just to get rid of the special case.

src/lib/commands/add.c

@@ -112,12 +112,7 @@ add(void)
     }
     strcpy(natp->nat_cnam, cntryname);
     strcpy(natp->nat_pnam, pname);
-    if (stat == STAT_NEW || stat == STAT_VIS)
     nat_reset(natp, stat, 0, 0);
-    else {
-	natp->nat_stat = stat;
-	pr("No special initializations done...\n");
-    }
     putnat(natp);
     return 0;
 }