cond: fixup path buffer size to fit the longest condition name

[aanderse]

cond_path() and cond_checkpath() built the /run/finit/cond/ path in a MAX_ARG_LEN buffer, so condition names longer than ~40 chars were truncated.

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context: i started using tasks to mount disks in the finix initramfs (.mount units anyone? 😆) so i can mount in parallel, speed things up, properly order other tasks, etc... i found a bug where some longer paths created tasks which wouldn't create conditions under /run/finit/cond/... for example:

task wait-dev:dev-disk-by-label-FINIX_LIVE {
  command = "/nix/store/4a021xa6sr06qq58ixnqiq2h5zsg5sln-wait-dev_dev-disk-by-label-FINIX_LIVE"
  conditions = {  }
  runlevel = "S"
}

i did a bit of testing and with these patches seems fine now 👍

[troglobit]

Nice catch! 💪