[COMMITTERS] pgsql: Fix output of char node fields

Fix output of char node fields

WRITE_CHAR_FIELD() didn't do any escaping, so that for example a zero
byte would cause the whole output string to be truncated.  To fix, pass
the char through outToken(), so it is escaped like a string.  Adjust the
reading side to handle this.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d80e73f2293429cf8a0a13c243852379ec2e37e2

Modified Files
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src/backend/nodes/outfuncs.c  | 20 +++++++++++++++++++-
src/backend/nodes/readfuncs.c |  3 ++-
2 files changed, 21 insertions(+), 2 deletions(-)