sdtid: Allow parse_sdtid() to work in a "less strict" mode
sdtid: Allow parse_sdtid() to work in a "less strict" mode

Template files are allowed to be missing entire sections, so enable strict
mode for a real sdtid but disable it for "stoken issue --template=foo"

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

mtmiller/stoken,mtmiller/stoken,cernekee/stoken,cernekee/stoken,mtmiller/stoken,cernekee/stoken,mtmiller/stoken,cernekee/stoken