Next version of the 'shield' function:
immediate configuraion.
Parsing of parameters with 'getopt' command.
Also made the few changes.
New variant the 'shield' function - with mutadle exec string.
Tiny clean the code of 'shield' function.
Merge branch 'feature-shield-w-param-n-pipe-v.2'
Implant the first variant of the 'shield' function
 - with string execution.
Updated working variant 1 of last vewr function 'shield':
evaluate mutable executuin string for parametrised call or not.
2'nd variant of last version of the 'shield' function.
Exec string in it's 'single quotas' - expantion only eval command.
Variant 2.5 of the 'shield' function:
expression combined from separated string in 'single quotes'.
Variant 2.6 of the last version function 'shield':
Maximum decomposition of the execution expression.