Re: [Libguestfs] use STREQ(a,b), not strcmp(a,b) == 0

The series below makes changes like these mechanically, one class of change per change-set: strcmp(...) == 0 to STREQ(...) strcmp(...) != 0 to STRNEQ(...) strncmp(...) == 0 to STREQLEN(...) strncmp(...) != 0 to STRNEQLEN(...) strcasecmp(...) == 0 to STRCASEEQ(...) strcasecmp(...) != 0 to STRCASENEQ(...) strncasecmp(...) == 0 to STRCASEEQLEN(...) strncasecmp(...) != 0 to STRCASENEQLEN(...)