Common link message

[victorkemp]

Tidy up by replacing a repeated pattern that looks like this:

            CALL OURTIM
            MODNAM = 'ALLOCATE MEMORY FOR SYS_LOAD ARRAY          '
            WRITE(SC1,1092) LINKNO,MODNAM,HOUR,MINUTE,SEC,SFRAC

with a subroutine call that looks like this:

            CALL LINK_MESSAGE('ALLOCATE MEMORY FOR SYS_LOAD ARRAY          ')

And another type that has an extra integer parameter.