Comment 1 for bug 1841974

The top commit of the branch at https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/miker/lp-1841974-calc-prox-for-age-protect implements this request by refactoring the proximity adjustment calculation code so we can call it from more places. In this case, from the hold permit test when a particular (new) YAOUS is in place and set to true. The decision about whether to use adjusted or baseline proximity is left to the item's circulating library.