Changed "multicast downstream LDM" (Mdl) to "multicast LDM receiver" (Mlr)
Enhanced to accomodate "--localstatedir=..." configure(1) option
Pass $localstatedir to ensureVar(1)
Renamed "dl7_*" functions to "down7_*"
Moved `down7_new()` into `down7_start(). Made `down7_stop()` block.
Added "if MAINTAINER" to tutorial creation
Eliminated removal of tarball on remote system
Fixed bug in function that replaces "(seq)" with sequence-number
Draft down7 completed. "file identifier" changed to "product index".
Changed "fiq_*" and "fim_*" functions to "piq_*" and "pim_*", respectively.

Futher changes due to "file ID" -> "product index".