BUG/MINOR: stats: Clear a bit more counters with in cli_parse_clear_counters().

Clear MaxSslRate, SslFrontendMaxKeyRate and SslBackendMaxKeyRate when
clear counters is used, it was probably forgotten when those counters were
added.

[wt: this can probably be backported as far as 1.5 in dumpstats.c]
1 file changed