Figure out a way to hide passwords

[malcolmsparks]

Too many passwords in jdbc urls... It would be great to figure out a way to have them provided elsewhere. Not sure how.

[martintrojer]

Has been discussed in various places, this ones are relevant;

• Difficult to securely set DB password weavejester/ragtime#60
• Listing DB/migrator/seed definitions in a resource file (or other sources) #14

[eric-johnson]

What about printing passwords? Using Joplin as a library, we can keep our passwords out of our project. Joplin, however, still calls (println ...) a lot, which may contain a jdbc url with a password, and may get written to a file.

I'm thinking about replacing calls to println with org.clojure/tools.logging, and then filtering out passwords using a custom log appender.

[martintrojer]

similar to #60

I'm all for replacing the printlns, if you convince me that we don't introduce any (further) dependency burden on projects that uses joplin as a library.

[martintrojer]

Will be fixed by #63