scpexe with pscp and plink fails with multiple args

defining more than one attribute in maven.repo.[name].ssh.args or maven.repo.[name].scp.args leads to an unknown option error in pscp, plink fails silently.
example:
maven.repo.[name].scp.args=-2 -P 50022

ERROR>pscp: unknown option "-2 -P 50022"
ERROR> try typing just "pscp" for help

assigning ports with maven.repo.[name].port=50022 doesn't help because plink and pscp both uses the "-P" to define the port

the problem is the runtime.exec call in ScpExeDeployer who uses a String[] instead of String

using a batch file as workaround makes the args property obsolete