strbuf_grow
ret = strbuf_grow(sb, 64);
ret = strbuf_grow(sb, len);
ret = strbuf_grow(sb, hint ? hint : 8192);
ret = strbuf_grow(sb, 8192);
return strbuf_grow(sb, hint);
int ret = strbuf_grow(sb, 1);
int ret = strbuf_grow(sb, len);
int strbuf_grow(struct strbuf *buf, size_t);
int ret = strbuf_grow(sb, 0);