Unit names can be 255 characters long, not 256. We first say "name prefix" and then continue with "unit prefix". Confusing. Couldn't figure out which term is better hence settled on "unit name prefix". (cherry picked from commit 75f7e5e54704e643aa9b50ce03ed02a49e75333f) (cherry picked from commit a2ef3c97bd38d189a4b2cb5c6248f01558c7c9d8)
System and Service Manager
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