en:

Now when you call parse_host_key (src/libs/zbxcommon/str.c) as the host name can be returned empty string. This will occur if ":" will be processed first character expression.

I propose to return NULL, but not an empty string.

ru:

?????? ??? ?????? ??????? parse_host_key (src/libs/zbxcommon/str.c) ? ???????? ????? ????? ????? ???? ????????? ?????? ??????. ????? ????? ???????????, ???? ":" ????? ?????? ???????? ??????????????? ?????????.

????????? ?????????? NULL, ? ?? ?????? ??????.