tree checksum vpatch file

all signers: bvt diana_coman asciilifeform

antecedents: ffa_ch16_miller_rabin.kv ffa_ch15_gcd.kv ffa_ch20d_litmus_nested_fix.kv

press order:

ffa_ch1_genesis.kvasciilifeform bvt diana_coman
ffa_ch2_logicals.kvasciilifeform bvt diana_coman
ffa_ch3_shifts.kvasciilifeform bvt diana_coman
ffa_ch4_ffacalc.kvasciilifeform bvt diana_coman
ffa_ch5_egypt.kvasciilifeform bvt diana_coman
ffa_ch6_simplest_rsa.kvasciilifeform bvt diana_coman
ffa_ch7_turbo_egyptians.kvasciilifeform bvt diana_coman
ffa_ch8_randomism.kvasciilifeform bvt diana_coman
ffa_ch9_exodus.kvasciilifeform bvt diana_coman
ffa_ch10_karatsuba.kvasciilifeform bvt diana_coman
ffa_ch11_tuning_and_api.kvasciilifeform bvt diana_coman
ffa_ch12_karatsuba_redux.kvasciilifeform diana_coman
ffa_w_borrow_expr.kvasciilifeform diana_coman
ffa_ch13_measure_and_qshifts.kvasciilifeform diana_coman
ffa_ch14_barrett.kvasciilifeform diana_coman
ffa_ch15_gcd.kvasciilifeform diana_coman
ffa_ch16_miller_rabin.kvasciilifeform diana_coman
ffa_ch17_peh.kvasciilifeform diana_coman
ffa_ch18_subroutines.kvasciilifeform diana_coman
ffa_ch19_peh_tuning_and_demos.kvasciilifeform diana_coman
ffa_ch20_litmus.kvasciilifeform
ffa_ch20b_litmus_legacy_hashes.kvasciilifeform
ffa_ch20c_litmus_clearsigned.kvasciilifeform
ffa_ch20d_litmus_nested_fix.kvasciilifeform
ffa_ch21a_bis_fix_ch15_gcd.kvasciilifeform

hunks:
ffa/MANIFEST.TXT
ffa/README
ffa/libffa/ffa.ads
ffa/libffa/fz_gcd.adb