typos in code comments

[richlv]

i know, i know it looks i don't have anything better to do, but i noticed these while looking at commits

a couple of typos in src/zabbix_server/server.c :

grep -n sturtup src/zabbix_server/server.c
164:/* Zabbix server sturtup time */

grep -n "test a custom developed functions" src/zabbix_server/server.c
261: * Purpose: test a custom developed functions *