If process's RLIMIT_NOFILE can't be changed, log an error but don't die. Fixes running with Valgrind.
If process's RLIMIT_NOFILE can't be changed, log an error but don't die.
Fixes running with Valgrind.

Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot