remove hardcoded limit in ACI

[westram]

Problem:

• the number of in/out streams and parameters is limited by GBL_MAX_ARGUMENTS (increased to 500 by [6045])
• the number of output-streams depends on -data for some commands (e.g. 'split')

Solution:

• allocate number of output-streams dynamically
• Note: output-streams of cmd#n are input-streams of cmd#(n+1)