Create TLS

TLS and Opportunistic TLS defined.
Create Drops - non-tech task #715

images were emailed to Matt Bernier
Merge branch 'patch-4' of https://github.com/SuePom/docs into SuePom-patch-4
add link to user guide > account > multicreds.
moved the file and added some links
Merge branch 'SuePom-patch-4' into develop
added blank index to fix the dir
Merge branch 'fixtransactional' into develop
fixed url
curl examples have h4 anchor
clarify headers parameter
update ### to h3 anchor liquid tags
include link for extension fields
remove Sandbox warning, since it's now in all Try It modals
Merge branch 'patch-1' of https://github.com/icozianu/docs into icozianu-patch-1
added images and put them into article
Spam.md - task #716
moved the file to be lowercase
Merge branch 'icozianu-patch-1' into develop
Merge pull request #779 from jacobmovingfwd/docs559

add link to user guide > account > multicreds.