enable -Wformat-nonliteral for linux and equivalent for windows compilers

Whitelist all the verified existing triggers:
makedefs.c: In function ‘name_file’
attrib.c: one compiler balks at a ? b : c for fmtstring
cmd.c: In function ‘extcmd_via_menu’
cmd.c: In function ‘wiz_levltyp_legend’
do.c: In function ‘goto_level’
do_name.c: In function ‘coord_desc’
dungeon.c: In function ‘overview_stats’
eat.c:  one compiler balks at a ? b : c for fmtstring
end.c:  one compiler balks at a ? b : c for fmtstring
engrave.c: In function ‘engr_stats’
hack:c one compiler balks at a ? b : c for fmtstring
hacklib.c: one compiler balks at a ? b : c for fmtstring
insight.c: one compiler balks at a ? b : c for fmtstring
invent.c: In function ‘let_to_name’
light.c: In function ‘light_stats’
mhitm.c: In function ‘missmm’
options.c: In function ‘handler_symset’
options.c: In function ‘basic_menu_colors’
options.c: In function ‘optfn_o_autopickup_exceptions’
options.c: In function ‘optfn_o_menu_colors’
options.c: In function ‘optfn_o_message_types’
options.c: In function ‘optfn_o_status_cond’
options.c: In function ‘optfn_o_status_hilites’
options.c: In function ‘doset’
options.c: In function ‘doset_add_menu’
options.c: In function ‘show_menu_controls’
options.c: In function ‘handle_add_list_remove’
pager.c: In function ‘do_supplemental_info’
pager.c: In function ‘dohelp’
region.c: In function ‘region_stats’
rumors.c: sscanf usage
sounds.c: In function ‘domonnoise’
spell.c: In function ‘dospellmenu’
timeout.c: In function ‘timer_stats’
topten.c: In function ‘outentry’, fscanf, sscanf, fprintf usage
windows.c: In function ‘genl_status_update’
zap.c: one compiler balks at a ? b : c for fmtstring
win/curses/cursstat.c: In function ‘curses_status_update’
win/tty/wintty.c: In function ‘tty_status_update’
win/win32/mswproc.c: In function ‘mswin_status_update’

src/spell.c

@@ -337,6 +337,8 @@ book_cursed(struct obj* book)
         stop_occupation();
 }
 
+DISABLE_WARNING_FORMAT_NONLITERAL
+
 static int
 learn(void)
 {
@@ -435,6 +437,8 @@ learn(void)
     return 0;
 }
 
+RESTORE_WARNING_FORMAT_NONLITERAL
+
 int
 study_book(register struct obj* spellbook)
 {
@@ -1628,6 +1632,8 @@ dovspell(void)
     return 0;
 }
 
+DISABLE_WARNING_FORMAT_NONLITERAL
+
 static boolean
 dospellmenu(
     const char *prompt,
@@ -1712,6 +1718,8 @@ dospellmenu(
     return FALSE;
 }
 
+RESTORE_WARNING_FORMAT_NONLITERAL
+
 static int
 percent_success(int spell)
 {