Fix: avoid foreach error

Fix: preview image not show with multicompany product sharing

not using dol_getprefix() to build host.

disabled.

FIX #6245 Thirdparty link in supplier invoices list, links to "comm/card" instead of "fourn/card" page

security.

Fix: avoid errors if constants values not exists

Fix #6247 #6248 Contact and Commands REST WebServices failed

FIX #6245 Thirdparty link in supplier invoices list, links to "comm/card" instead of "fourn/card" page

Conflicts:
	htdocs/filefunc.inc.php
	htdocs/langs/en_US/errors.lang

FIX #6227 Document models table header "Unit" is shown in 2 lines in Spanish

Fix: Accountancy - Problem on quadratus export