Fix Range Header parsing
content-range
header is no longer taken into account, and do the disclaimer is not shown anymore when data selection exceeds the limit.
see: https://de-qa.siscc.org/vis?lc=en&df[ds]=qa%3Astable&df[id]=DF_TEST_CV&df[ag]=AGENCY&df[vs]=1.0&av=true&pd=%2C&dq=0176%2B0596.CASES_D%2BCASES_W...P.D.&ly[rw]=REF_AREA&ly[cl]=TIME_PERIOD&ly[rs]=MEASURE%2CUNIT_MEASURE&lo=2 on this example the content-range
indicates a total of observations greater than 2.500 but no disclaimer is shown.