[9fans] inconsistent comparison?

[arisawa <arisawa@ar.aichi-u.ac.jp>]

Hello,

/sys/lib/mimetype is referenced in three files:
/sys/src/cmd/ip/httpd/content.c	# for outgoing file
/sys/src/cmd/upas/marshal/marshal.c	# for outgoing file
/usr/arisawa/src/upas/vf/vf.c	# for incoming file

the codes are as follows.

/sys/src/cmd/ip/httpd/content.c
/sys/src/cmd/ip/httpd/content.c
	while((p = strrchr(buf, '.')) != nil){
		for(s = suffixes; s; s = s->next){
			if(strcmp(p, s->suffix) == 0){
				if(s->generic != nil && type == nil)
					type = hmkcontent(hc, s->generic, s->specific, nil);
				if(s->encoding != nil && enc == nil)
					enc = hmkcontent(hc, s->encoding, nil, nil);
			}
		}
		*p = 0;
	}

/sys/src/cmd/upas/marshal/marshal.c
	/* try the mime types file */
	if(p != nil){
		if(mimetypes == nil)
			readmimetypes();
		for(c = mimetypes; c != nil && c->ext != nil; c++)
			if(strcmp(p, c->ext) == 0){
				a->type = c->type;
				a->ctype = c;
				return a;
			}
	}


/sys/src/cmd/upas/vf/vf.c
	for(m = mtypes; m != nil; m = m->next)
		if(cistrcmp(p, m->ext) == 0){
			switch(m->class){
			case 'm':
			case 'y':
				return 0;
			case 'p':
				*p = 0;
				rv = badfile(name);
				*p = '.';
				return rv;
			case 'r':
				return 2;
			}
		}


these codes are in 9front but probably same as both official plan9 and 9atom.
note that vf.c uses cistrcmp() but others use strcmp().
this these are intensional?