Revert the change in December about date matching threshold.

[Christian Stimming]

Log Message:
-----------
Revert the change in December about date matching threshold.

2005-02-21  Christian Stimming  <stimming at tuhh.de>

	* src/import-export/import-backend.c, import-backend.h,
	import-main-matcher.h: Revert the change in December about date
	matching thresholds that broke some OFX import. Now, the hard
	limit days interval is set by the importing sub-module when
	creating the dialog. This way, HBCI and OFX can set their
	different requirements. (Note: QIF does not use this code at all.)

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/import-export:
        import-backend.c
        import-backend.h
        import-main-matcher.c
        import-main-matcher.h
        import-settings.c
        import-settings.h
    gnucash/src/import-export/hbci:
        gnc-hbci-gettrans.c
    gnucash/src/import-export/ofx:
        gnc-ofx-import.c