mount_smbfs: Issue a warning when .nsmbrc section name contains lowercase characters

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Summary

Fix for bug https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231656

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Bump.

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Bump.

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Bump.

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[donner]

contrib/smbfs/lib/smb/rcfile.c

166–171

I'd propose:

for(sectletter = sectname; *sectletter; sectletter++) {
   if(isupper(*sectletter)  || *sectletter == ':')
      continue;
   if(!strcmp(sectname, "default"))
      dprintf(STDERR_FILENO, "warning: Section name [%s] may contain problematic chars, like lower-case letters\n", sectname);
   break;
}

This makes the scan more readable, short cut if the result is known, and keep the search and the response together.

[bapt]

contrib/smbfs/lib/smb/rcfile.c

166–171

I like the proposal better, but I think that special chars should be allowed, then testing isupper and !islower should do the trick instead of only testing ':'

[donner]

contrib/smbfs/lib/smb/rcfile.c

166–171

This would simplify the code to:

for(sectletter = sectname; *sectletter; sectletter++) {
  if(islower(*sectletter)) {
     if(!strcmp(sectname, "default"))
        dprintf(STDERR_FILENO, "warning: Section name [%s] contains lower-case letters\n", sectname);
     break;
  }
}

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Address comments.

[donner]

contrib/smbfs/lib/smb/rcfile.c

161–162

If the section was found, the check is skipped.

That's okay, because the check should be done only if the a new section is encountered the first time.