use C99 syntax for filling the table_backend structs; ok gilles@

unify smtpd and makemap table parser

These are supposed to parse the same file format but have subtle
difference in the handling of comments, continuation lines and escaping.

Converge both to the s

unify smtpd and makemap table parser

These are supposed to parse the same file format but have subtle
difference in the handling of comments, continuation lines and escaping.

Converge both to the simpler smtpd parser which doesn't handle
continuation lines nor escaping, and support comments only at the start
of the line.

improvements and ok millert@

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add required headers for smtpd.h and remove unnecessary ones in other files.

ok jung@

type static tables on the fly when the first element is added

ok gilles@

fix logging of list entries

use private data structure for managing static table content

ok gilles@

table_fetch() always expect a valid dst pointer.

ok gilles@

introduce dump() and add() table methods, only implemented for static tables.

ok gilles@

pass the table pointer to the lookup()/fecth() methods

ok gilles@

change the close() method to take the table pointer

ok gilles

Make the backend open method return an int to report success.
The implementation is responsible for setting the handle pointer
as needed.

ok gilles@

reorder parameters for consistency

get rid of the unused dict argument in table lookup and fetch api.

ok gilles@

move the table backend name in the backend struct.
remove unused function.

ok gilles@

Simplify the table backend interface: lookup results are returned
as strings, and parsing is handled by the upper layer.

ok gilles@

introduce K_REGEX table type and table_regex_match(), unused for now

ok eric@

rework the table API so that it takes a struct smtpd * context in parameter
of functions creating, looking up or destroying tables.

this is a first step in cleaning up parse.y so it doesn't have sid

rework the table API so that it takes a struct smtpd * context in parameter
of functions creating, looking up or destroying tables.

this is a first step in cleaning up parse.y so it doesn't have side effects
outside of parse_config(), bringing nothing but making code cleaner.

ok millert@

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switch smtpd to new grammar

ok eric@

Change the table parser logic. If the table is untyped, determine
its type by examining the first entry: if it contains a separator, type
is "mapping", otherwise type is "list". All entries are then

Change the table parser logic. If the table is untyped, determine
its type by examining the first entry: if it contains a separator, type
is "mapping", otherwise type is "list". All entries are then parsed
according to the table type. The "list" type can also be forced by using
the "@list" directive in a comment. This allows to define list of entries
containing a separator.

Also, log parse errors.

ok gilles@

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remove useless indirection for reading the file content

ok gilles@

add a log_warn() so that when smtpd fails to start due to a problem reading
the configuration file of a table, user actually understands what happens

diff by Alexis Vachette, ok jung@

remove spaces after '!'

no binary change

ok millert

Wrap long lines.

Ok gilles@ jung@

teach table_db and table_static about mailaddr maps (unused yet)

ok sunil@, ok jung@

Convert some fgetln to getline.

Ok gilles@, giovanni@, millert@