Possible memory leak in torsocks 2.2.0

valgrind found a possible memory leak in torsocks 2.2.0:

==29922== 79 bytes in 8 blocks are definitely lost in loss record 17 of 68
==29922==    at 0x483579F: malloc (vg_replace_malloc.c:309)
==29922==    by 0x569344A: strdup (strdup.c:42)
==29922==    by 0x484D82A: utils_tokenize_ignore_comments (utils.c:146)
==29922==    by 0x484CF88: parse_config_line (config-file.c:134)
==29922==    by 0x484CF88: parse_config_file (config-file.c:218)
==29922==    by 0x484D423: config_file_read (config-file.c:567)
==29922==    by 0x484797E: init_config (torsocks.c:163)
==29922==    by 0x484797E: tsocks_init (torsocks.c:328)
==29922==    by 0x484DFA5: tsocks_once (compat.c:94)
==29922==    by 0x400F259: call_init.part.0 (dl-init.c:72)
==29922==    by 0x400F358: call_init (dl-init.c:30)
==29922==    by 0x400F358: _dl_init (dl-init.c:119)
==29922==    by 0x40010C9: ??? (in /lib64/ld-2.29.so)

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