Updated copyright notices to include the year 2018.

lib-index: Add mail_index.event

lib-storage: test-mail-search-args-simplify - test with initialized args

lib-storage: mail_search_args_to_imap() - don't add parenthesis around OR There's no need to write "(OR a b)" when "OR a b" works just the same.

lib-storage: Fix memory leak in mail_search_args_simplify() The leaks happened when search args were already initialized (which they usually were at this point) and some of the args were dropped entirely. Improved the unit test to initialize search args before calling the simplify, so valgrind would notice if there are any leaks.

lib-storage: mail_search_args_simplify() - deduplicate flags This needs to be done in a bit more complicated way because multiple SEARCH_FLAGS parameters are wanted to be merged together using a single shared value.flags. Move this merging last after all the deduplication is done.

lib-storage: mail_search_args_simplify() - simplify "x AND NOT x" Implemented for SEARCH_KEYWORD, SEARCH_TEXT, SEARCH_BODY and SEARCH_HEADER*. Dates and sizes would need special code, which gets a bit complicated.

lib-storage: Add more tests to test-mail-search-args-simplify

lib-storage: mail_search_arg_to_imap() - remove () around a single flag/keyword

lib-storage: mail_search_args_simplify() - deduplicate KEYWORDs

Updated copyright notices to include the year 2017.

global: Use const for all test_functions[] arrays

global: Use "static const" for all struct tests[] arrays

lib-storage: Fix "*" in SEARCH seqset/uidset 4294967295 is used for "*", which matches the last existing message. Which we don't know what it is at the time of search args simplification, so avoid making any assumptions about it. It's a bit ugly that 4294967295 can't be used as a valid UID, but this restriction has already existed since the beginning of Dovecot. A future alternative might be to add MAIL_SEARCH_ARG_FLAG_SEQSET_WITH_STAR, but that's a bit complicated change.

lib-storage: Add test for inversion of n->max In mail-search-simplify-args, ensure that ALL NOT UID 3:* becomes UID 1:2

lib-storage: Fix simplifying sequence sets and UID sets. They were being handled completely wrong. The unit tests testing them were also completely wrong.

global: freshen copyright git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-5]/$1-2016/g;s/ (201[0-5]) Dovecot/ $1-2016 Dovecot/'

lib-storage: Fixed mail_search_args_simplify() with empty args. This fixes assert-crash in doveadm mailbox list.

lib-storage: mail_search_args_simplify() handles now ALL better.

lib-storage: Code cleanup - moved BODY/TEXT "" optimization to mail_search_args_simplify()

lib-storage: mail_search_args_simplify() handles now "(a OR b) AND (a OR c)" -> "a OR (b AND c)"

lib-storage: mail_search_args_simplify() refactoring Removed parent_arg from mail_search_args_simplify_extract_common_and() in preperation for the next changeset.

lib-storage: mail_search_args_simplify() handles now "a AND (a OR b)" -> "a"

lib-storage: Minor test-mail-search-args-simplify unit test improvements

lib-storage: mail_search_args_simplify() handles now "(a AND b) OR (a AND c)" -> "a AND (b OR c)"

lib-storage: mail_search_args_simplify() handles now "a OR (a AND b)" -> "a"

lib-storage: mail_search_args_simplify() handles now SEARCH_HEADER*/TEXT/BODY These are especially useful with lib-fts, where stemming and other filtering can produce duplicates. There's some internal deduplication, but it doesn't catch all of these.

lib-storage: mail_search_args_simplify() handles now SEARCH_SMALLER/LARGER

lib-storage: mail_search_args_simplify() handles now SEARCH_BEFORE/ON/SINCE

lib-storage: mail_search_args_simplify() merges now seqsets and uidsets.

lib-storage: If mail_search_args_simplify() merges flags, check again if any SUBs can be removed. The subquery may have been replaced with a single SEARCH_FLAGS parameter.

lib-storage: Moved mail_search_args_simplify() to its own file and added unit tests. No functional changes.