get feature name from /region_name or /product

[sunm19810-pki]

for features like

Protein         1..147
                     /product="ribonuclease 4 precursor"
                     /EC_number="3.1.27.-"
                     /note="RNase 4; ribonuclease A B1; ribonuclease, RNase A
                     family, 4; epididymis secretory sperm binding protein"
                     /calculated_mol_wt=13824

or

Region          29..147
                     /region_name="RNAse_Pc"
                     /note="Pancreatic ribonuclease; smart00092"
                     /db_xref="CDD:128403"

@tnrich