tree checksum vpatch file

all signers: asciilifeform diana_coman

antecedents: udp_genesis

press order:

udp_genesisasciilifeform diana_coman
udp_errata_asciilifeformasciilifeform diana_coman

hunks:
udp/echodemo/udp_echo_demo.adb
udp/libudp/restrict.adc
udp/libudp/udp.adb
udp/libudp/udp.ads
udp/libudp/unix_udp.c
udp/manifest
udp/txdemo/udp_tx_demo.adb