[M] Change in libosmocore[master]: CTRL: get rate_ctr_group by the id from rate_ctr_group_set_name()

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laforge has posted comments on this change by neels. ( https://gerrit.osmocom.org/c/libosmocore/+/37881?usp=email )

Change subject: CTRL: get rate_ctr_group by the id from rate_ctr_group_set_name() ......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2: the obvious potential problem here is of course the inefficiency of a linear-list iteration in case there are many such requests. So either we accept that cost, or we introduce some kind of hashing scheme, or we don't offer such a look-up function...