GitLab

Equality operator tests were reliant on two Lease6 structs, constructed
back to back to have the same value for cltt_, which gets its value from
time(NULL).  Corrected this by simple assignment to ensure they are always
equal as the test expects.

Also tidied up a few comments.

reviewed by jelte via jabber.

Changes some log message descriptions and some
function arguments and some output.

As the address is th eprimary key of the table, there can only ever
be at most one lease in the database with a given address.  Additional
selection by subnet ID is not needed.

Including:
* Updates to comments etc.
* Addition of Lease4::operator==() (and associated unit tests)

This constructore is for use by the MySQL code.  By passing buffer
addresses and lengths, the need for the creation of intermediate
std::vectors is avoided.

Also fix some issues from the review.

The message when the DHCPv6 database backend is started now includes
both the type and the name of the database.

 addLease6(), getLease6(IOAddress), deleteLease6(IOAddress) working.
 That is a bare minimum that is required for testing allocation
 engine.

Also includes first unit test, which fails.