cmd: Add option to add a param at a specific pos
Rather than having to use cmd_Seek, followed by cmd_AddParam,
followed by another cmd_Seek, add a function which permits parameters
to be added at specific reference points. This allows programs to
declare a list (either as an enum or specific #defines) of parameter
code points, rather than using raw numbers.
Change-Id: I25c0d501e678aa2818d296c776d8c5d03b8cdabe
Reviewed-on: http://gerrit.openafs.org/4542
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>