configure.ac, lib/, src/: Assume setgroups(2) and initgroups(3) exist

[alejandro-colomar]

They're available in every system I checked: glibc,musl,{Free,Net,Open}BSD.

---

Revisions:

v1b

• Rebase

$ git range-diff master..gh/setgroups shadow/master..setgroups 
1:  878f9ea6 = 1:  5fdcd89b configure.ac, lib/, src/: Assume setgroups(2) exists
2:  0270f587 = 2:  ee242d98 configure.ac, lib/: Assume initgroups(3) exists

v1c

• Rebase

$ git range-diff master..gh/setgroups shadow/master..setgroups 
1:  5fdcd89b = 1:  c6790b27 configure.ac, lib/, src/: Assume setgroups(2) exists
2:  ee242d98 = 2:  6518b23c configure.ac, lib/: Assume initgroups(3) exists

v1d

• Rebase

$ git range-diff master..gh/setgroups shadow/master..setgroups 
1:  c6790b27 ! 1:  d4be5ef8 configure.ac, lib/, src/: Assume setgroups(2) exists
    @@ lib/addgrps.c
      
      #include "prototypes.h"
      #include "defines.h"
    -@@ lib/addgrps.c: int add_groups (const char *list)
    +@@ lib/addgrps.c: add_groups(const char *list)
        free (grouplist);
        return 0;
      }
2:  6518b23c = 2:  8919d4a4 configure.ac, lib/: Assume initgroups(3) exists

v1e

• Rebase

$ git range-diff master..gh/setgroups shadow/master..setgroups 
1:  d4be5ef8 = 1:  b473327a configure.ac, lib/, src/: Assume setgroups(2) exists
2:  8919d4a4 = 2:  76f9d512 configure.ac, lib/: Assume initgroups(3) exists

v1f

• Rebase

$ git range-diff master..gh/setgroups shadow/master..setgroups 
1:  b473327a = 1:  e5ecbf64 configure.ac, lib/, src/: Assume setgroups(2) exists
2:  76f9d512 = 2:  8c555adc configure.ac, lib/: Assume initgroups(3) exists

[alejandro-colomar]

Queued after the release of 4.17.0.