common,agent,dirmngr,g10,tools: Fix split_fields API.
* common/stringhelp.h (split_fields): Use const * for the strings in the ARRAY. (split_fields_colon): Likewise. * common/stringhelp.c (split_fields, split_fields_colon): Fix the implementation. * agent/call-scd.c, agent/command.c: Follow the change. * common/t-stringhelp.c, dirmngr/loadswdb.c: Likewise. * g10/call-agent.c, tools/card-call-scd.c: Likewise. * tools/card-yubikey.c, tools/gpg-card.c: Likewise. * tools/gpg-card.h, tools/gpg-wks-client.c: Likewise. * tools/gpgconf-comp.c, tools/gpgconf.c: Likewise. * tools/wks-util.c: Likewise.
The strings in the ARRAY don't need to be released by caller, as those
are references. It's easier to follow the code when it's explicitly
const *.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>