[SSSD] [sssd PR#5684][comment] src/conf_macros.m4: set default value /run for pidpath

[alexey-tikhonov]

URL: https://github.com/SSSD/sssd/pull/5684
Title: #5684: src/conf_macros.m4: set default value /run for pidpath

alexey-tikhonov commented:
"""
> Hi, we certainly welcome your contribution. It just would be good to use a runstatedir which represents the /run directory but at the same time remains configurable instead of hardcoding the value again, if that is something you are willing to work on.

Since there was no response, I will close this PR awhile.
Please open a new one in case you are still interested to work on this.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5684#issuecomment-934493704