The "/vdiff" page:
Show the difference between two check-ins identified by the from= and
to= query parameters.
from=TAG Left side of the comparison
to=TAG Right side of the comparison
branch=TAG Show all changes on a particular branch
diff=INTEGER 0: none, 1: unified, 2: side-by-side
glob=STRING only diff files matching this glob
dc=N show N lines of context around each diff
w=BOOLEAN ignore whitespace when computing diffs
nohdr omit the description at the top of the page
Show all differences between two check-ins.