Add more details on what the Supported Archive Formats option controls

(and doesn't control)

src/sbbs3/scfg/scfgxfr1.c

@@ -340,17 +340,21 @@ void xfer_opts()
 					"'.') that are supported by libarchive for the creation of QWK/REP\n"
 					"packets and temporary archives of files for users to download.\n"
 					"\n"
-					"By default, this list is: `zip, 7z, tgz`.\n"
+					"By default, the supported archive formats are: `zip, 7z, tgz`.\n"
 					"\n"
 					"Synchronet uses `libarchive` for internal archive file support\n"
 					"(see `http://libarchive.org/` for details).  Depending on the version of\n"
 					"libarchive, build options, and OS/system configuration, more archive\n"
-					"formats may be supported.\n"
+					"formats than the default list may be supported.\n"
 					"\n"
 					"If you want additional formats to be available for your users and you've\n"
 					"confirmed system compatibility (e.g. created and extracted archives\n"
 					"of the desired types using `archive.js`), you can add the standard file\n"
-					"extensions for those additional archive formats to this list."
+					"extensions for those additional archive formats to this list.\n"
+					"\n"
+					"This list has no impact on the types of files allowed to be uploaded\n"
+					"into file areas or the ability to view, test, or extract archives of\n"
+					"any type.\n"
 					;
 		        strListCombine(cfg.supported_archive_formats, str, sizeof str, ", ");
 				uifc.input(WIN_MID | WIN_SAV, 0 , 0, "Supported Archive Formats", str, sizeof str - 1, K_EDIT);