client: remove unused Docker images and containers on startup

[davidpanderson]

The names of images and containers created by docker_wrapper have a particular form:
boinc__ and boinc__.

docker_wrapper normally cleans up after itself.
But if it crashes, these objects could hang around forever, taking up disk space.

So clean them up on client startup, as follows:
make lists of the image/container names for active Docker tasks.
Then go through the Docker images and containers.
Remove any that

• were created by Docker wrapper (i.e. have boinc__ names)
• aren't in the active-task lists

On Unix, do this on the host itself if it has Docker installed.
On Win, do it for every WSL distro that has Docker installed.

[AenBleidd]

@davidpanderson, please fix build errors

[AenBleidd]

@davidpanderson,
there are some other errors left:

• linux:

util.cpp: In member function ‘int DOCKER_CONN::command(const char*, std::vector<std::__cxx11::basic_string<char> >&)’:
boinc_stdio.h:32:19: error: cannot convert ‘FCGI_FILE*’ to ‘FILE*’
   32 | #define stderr    FCGI_stderr
      |                   ^~~~~~~~~~~
      |                   |
      |                   FCGI_FILE*
util.cpp:732:17: note: in expansion of macro ‘stderr’
  732 |         fprintf(stderr, "running docker command: %s\n", cmd);
      |                 ^~~~~~
In file included from /usr/include/stdio.h:894,
                 from /usr/include/fcgi_stdio.h:18,
                 from boinc_stdio.h:28,
                 from util.cpp:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:103:27: note:   initializing argument 1 of ‘int fprintf(FILE*, const char*, ...)’
  103 | fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
      |          ~~~~~~~~~~~~~~~~~^~~~~~~~
In file included from boinc_stdio.h:28,
                 from util.cpp:34:
boinc_stdio.h:32:19: error: cannot convert ‘FCGI_FILE*’ to ‘FILE*’
   32 | #define stderr    FCGI_stderr
      |                   ^~~~~~~~~~~
      |                   |
      |                   FCGI_FILE*
util.cpp:752:21: note: in expansion of macro ‘stderr’
  752 |             fprintf(stderr, "command failed: %s\n", boincerror(retval));
      |                     ^~~~~~
In file included from /usr/include/stdio.h:894,
                 from /usr/include/fcgi_stdio.h:18,
                 from boinc_stdio.h:28,
                 from util.cpp:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:103:27: note:   initializing argument 1 of ‘int fprintf(FILE*, const char*, ...)’
  103 | fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
      |          ~~~~~~~~~~~~~~~~~^~~~~~~~
In file included from boinc_stdio.h:28,
                 from util.cpp:34:
boinc_stdio.h:32:19: error: cannot convert ‘FCGI_FILE*’ to ‘FILE*’
   32 | #define stderr    FCGI_stderr
      |                   ^~~~~~~~~~~
      |                   |
      |                   FCGI_FILE*
util.cpp:758:17: note: in expansion of macro ‘stderr’
  758 |         fprintf(stderr, "command output:\n");
      |                 ^~~~~~
In file included from /usr/include/stdio.h:894,
                 from /usr/include/fcgi_stdio.h:18,
                 from boinc_stdio.h:28,
                 from util.cpp:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:103:27: note:   initializing argument 1 of ‘int fprintf(FILE*, const char*, ...)’
  103 | fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
      |          ~~~~~~~~~~~~~~~~~^~~~~~~~
In file included from boinc_stdio.h:28,
                 from util.cpp:34:
boinc_stdio.h:32:19: error: cannot convert ‘FCGI_FILE*’ to ‘FILE*’
   32 | #define stderr    FCGI_stderr
      |                   ^~~~~~~~~~~
      |                   |
      |                   FCGI_FILE*
util.cpp:760:21: note: in expansion of macro ‘stderr’
  760 |             fprintf(stderr, "%s\n", line.c_str());
      |                     ^~~~~~
In file included from /usr/include/stdio.h:894,
                 from /usr/include/fcgi_stdio.h:18,
                 from boinc_stdio.h:28,
                 from util.cpp:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:103:27: note:   initializing argument 1 of ‘int fprintf(FILE*, const char*, ...)’
  103 | fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
      |          ~~~~~~~~~~~~~~~~~^~~~~~~~
make[2]: *** [Makefile:1898: libboinc_fcgi_la-util.lo] Error 1
make[2]: Leaving directory '/home/runner/work/boinc/boinc/lib'
make[1]: *** [Makefile:687: all-recursive] Error 1
make[1]: Leaving directory '/home/runner/work/boinc/boinc'
make: *** [Makefile:591: all] Error 2

• windows:

       "D:\a\boinc\boinc\win_build\sim.vcxproj.metaproj" (default target) (5) ->
       "D:\a\boinc\boinc\win_build\sim.vcxproj" (default target) (52) ->
       (ClCompile target) -> 
         D:\a\boinc\boinc\client\cs_apps.cpp(483,12): error C2660: 'DOCKER_CONN::init': function does not take 2 arguments [D:\a\boinc\boinc\win_build\sim.vcxproj]


       "D:\a\boinc\boinc\win_build\boinc.sln" (default target) (1) ->
       "D:\a\boinc\boinc\win_build\boinccmd.vcxproj" (default target) (20) ->
       "D:\a\boinc\boinc\win_build\boinc_cli.vcxproj" (default target) (24) ->
         D:\a\boinc\boinc\client\cs_apps.cpp(483,12): error C2660: 'DOCKER_CONN::init': function does not take 2 arguments [D:\a\boinc\boinc\win_build\boinc_cli.vcxproj]```

[AenBleidd]

@davidpanderson, linux is still failing because of FCGI for the server build

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 43 lines in your changes missing coverage. Please review.

Project coverage is 10.73%. Comparing base (7a873b1) to head (3645a16).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/util.cpp	0.00%	43 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5877      +/-   ##
============================================
- Coverage     10.75%   10.73%   -0.02%     
  Complexity     1068     1068              
============================================
  Files           280      280              
  Lines         36555    36598      +43     
  Branches       8472     8482      +10     
============================================
  Hits           3930     3930              
- Misses        32236    32279      +43     
  Partials        389      389              

Files with missing lines	Coverage Δ
lib/util.h	40.00% <ø> (ø)
lib/util.cpp	22.41% <0.00%> (-7.36%)	⬇️