Update to pkg 1.9.99.3

• Add a fallback for utimensat when reporting EOPNOTSUPP
• replace libsbuf with utstring for portability
• Overwrite some sqlite vfs functions to allow capsicumisation of pkg
• move more pkg audit details into the library
• allow to run pkg query without any privileges
• extend the audit periodic script to report deprecated packages
• Fix fd leak to rcscripts
• stop dropping privieges during fetching it causes more issues than it solves
• speed walking though [reverse]dependencies
• Update blake2b to latest version
• Add blake2s to the list of supported checksums
• Internal digest now default on blake2b on 64 bits and blake2s on 32 bits.
• Fix segfault when ABI is defined but empty
• Do not use the shared library provides/requires on non FreeBSD/Linux
• Define _NETBSD_SOURCES on NetBSD to allow libfetch to use funopen
• Document vital flags
• Fix potential double free when dealing with @config keyword