Here is several improvements to make trigger expression constructor more consistent for different functions which have similar logic.

1. #count as a parameter for fuzzytime is allowed - but should be limited to seconds only.

• 'Timestamp not different from Zabbix server time for more than T seconds, then N = 1, 0 - otherwise'

2. For regexp, iregexp - there only seconds available but #count should be as well.

• 'Regular expression V matching last value in period T, then N = 1, 0 - otherwise'
• 'Regular expression V matching last value in period T, then N = 1, 0 - otherwise (non case-sensitive)'

3. str function should have similar form design as for example regexp

• 'Find string T in last (most recent) value. N = 1 - if found, 0 - otherwise'

Maybe other function should be checked as well