[Systrace] function request

[John Wong]

two function request:

1. like "filter_inpath", but is use "strncmp(line, logic->filterdata,
strlen(logic->filterdata))" to compare, and no need "c != '/' && c !=
'\0'"

2. like "filter_stringmatch", but is use "strcmp" to compare, not strcasecmp

i use openbsd ... thanks!!