(Adds quotes from PM Trudeau in paragraphs 1, 3-8, background in paragraph 9) OTTAWA, Nov 8 (Reuters) - Canadian Prime Minister Justin Trudeau on Wednesday called for a significant humanitarian pause in the Gaza conflict to allow for the release of all hostages and the delivery of enough aid to address civilian needs. Canada had previously called for a series of halts in the fighting to allow aid into the Palestinian enclave but had steered clear of advocating a longer pause in the fighting that has killed thousands since the Islamist group Hamas launched an attack on Israel last month....