Confusing warning message for`createdb-mode`

[Ieremie]

Hello,

When using easy-linclust with a fasta file containing sequences over multiple lines, there is a confusing warning message

[Multiline fasta can not be combined with --createdb-mode 0
We recompute with --createdb-mode 1

This is a similar issue to this one #955.

By default easy-linclust is run with --createdb-mode 1 which uses the SEQUENCE_SPLIT_MODE_SOFT = 1 parameter. I believe the messages should be reversed here. We can't run with --createdb-mode 1 so we change to --createdb-mode 0 (SEQUENCE_SPLIT_MODE_HARD = 0)

My understanding is that the hard mode is the one changing the input fasta to the desired format.