Following positive feedback on tech-userlevel, move the sys_info
script from othersrc to usr.bin/sys_info

The sys_info script is a small script which will show the version
information for installed utilities. It also works on the kernel, and
on most libraries.

Its use is as follow:

[19:41:13] agc@netbsd-002 ...external/bsd/sys_info [4568] > ./sys_info -a
awk-20121220
bind-9.10.3pl3
bzip2-1.0.6
calendar-20160601
ftpd-20110904
g++-4.8.5
gcc-4.8.5
grep-2.5.1anb1
gzip-20150113
bozohttpd-20151231
NetBSD-7.99.26
netpgp-3.99.17
netpgpverify-20160214
ntp-4.2.8pl5
openssl-1.0.1r
sqlite3-3.12.2
openssh-7.1
opensshd-7.1
tcsh-6.19.00
xz-5.2.1
[19:41:20] agc@netbsd-002 ...external/bsd/sys_info [4569] > ./sys_info ntp ssh netpgp
ntp-4.2.8pl5
openssh-7.1
netpgp-3.99.17
[19:41:31] agc@netbsd-002 ...external/bsd/sys_info [4570] > ./sys_info ntp ssh netbsd
ntp-4.2.8pl5
openssh-7.1
NetBSD-7.99.26
[19:41:38] agc@netbsd-002 ...external/bsd/sys_info [4571] >

The -a option can be given to the script to print out the information
on all known components.

The sys_info script also works on libraries, returning their
"versions" as given by the shared object version numbers.

[19:45:06] agc@netbsd-002 ...external/bsd/sys_info [4572] > ./sys_info libevent libXfont libc netbsd
libevent-4.0
libXfont-3.0
libc-12.200
NetBSD-7.99.26
[19:45:27] agc@netbsd-002 ...external/bsd/sys_info [4573] >

Alistair Crooks
Wed Jun 1 19:44:01 PDT 2016