Support new JCL from z/OS V2R1

JCL Editor breaks on z/OS V2R1 features like EXPORT SYMLIST

Please see following JCL:

//MKAIQM JOB 7904,KAISER,MSGLEVEL=(1,1),MSGCLASS=K,CLASS=A,
// NOTIFY=&SYSUID,REGION=512M
// EXPORT SYMLIST=(YEAR,USER,QMDIR,QMFILE,QMDSN)
// SET YEAR='2015'
// SET USER='mkai'
// SET QMDIR='/opt/qmplanner/kst7904'
// SET QMFILE='qm-notification'
// SET QMDSN=HERI.QMREXX.QMLIST.Y&YEAR
//RCVPLC EXEC PGM=BPXBATCH,REGION=32M
//SYSOUT DD SYSOUT=*
//STDOUT DD SYSOUT=*
//STDPARM DD DATA,DLM=##,SYMBOLS=JCLONLY
SH cd &QMDIR. && ./qmplanner-initial.sh &YEAR
##
// ... and so on

The RSC in JCL editor breaks on EXPORT SYMLIST:

Multiple markers at this line
- "PROC" expected after this token
- "PendStatement" inserted to complete scope