advertise STARTTLS support
fix partial case sensitivity of networks

fixes #45
add unique indexes

to keep things clean
Merge pull request #57 from ccutrer/starttls

advertise STARTTLS support
Merge pull request #58 from ccutrer/networkcasesensitivity

fix partial case sensitivity of networks
Merge pull request #59 from ccutrer/uniqueindexes

add unique indexes