This is a 2nd reroll of a series to introduce the --verify option for the user
to change pacman's default signature verification level on the command line.
Patch 1/2 changes option_verifysig to accept non-capitalized versions of
"Always", "Optional" and "Never".
Patch 2/2 introduces the --verify option itself
Pang Yan Han (2):
option_verifysig: Accept non-caps sig levels
Add --verify option for signature level