Log Message:
logswan: update to 2.1.11.

Logswan 2.1.11 (2021-11-16)

- Bump CMake minimum required version to 2.8.12
- Add SPDX short license identifier in source files
- Use CMAKE_C_STANDARD instead of hardcoding compiler flags
- Switch to using getline(3) instead of fgets(3)
- Call hll_init() after doing getopt() processing