Connection string format does not follow Linux standard

[tchilton]

The syntax of the connection string does not follow the normal Linux standard of user@host:/path since the colon component is missing.
This makes the plug-in a little misleading / error prone for people who are used to Linux path names.

Suggestion to add a colon character into the path to provide uniformity to other Linux tools

Examples of things that use this approach include SCP, NFS, rsync, etc.