From yast2 software manager in Tumbleweed the remmina-plugin-rdp fails to
install because of an unsatisfiable dependency - libfreerdp-channels.so.1.0()

In order to install it I have rebuilt src.rpm from here

ftp://ftp.icm.edu.pl/vol/rzm5/linux-opensuse/source/distribution/leap/42.1/repo/oss/suse/src/freerdp-1.0.2-9.1.src.rpm

Then installed 2 of the 4 resulting binary rpm files:
freerdp-devel-1.0.2-9.1.x86_64.rpm
libfreerdp-1_0-1.0.2-9.1.x86_64.rpm

The dependency is then satisfied and remmina-plugin-rdp then installs without
further issue.

Appears that the builds of freerdp libraries in Tumbleweed are missing the
required libfreerdp-channels.so.1.0 file.