core: use one date format when day changes from day to day+1
doc: use a build directory in example of compilation with autotools (user's guide)
core: add cygport file to build Cygwin packages
doc: add nick modes in screen layout (user's guide)
core: add file weechat.cygport.in in tarballs (fix compilation error when compiling tarball)
doc: add version >= 0.4.2 for new format of callback in function bar_item_new (plugin API reference)
core: remove dependencies in weechat.cygport.in, let cygport tool do that automatically
core: add file "compile" in .gitignore
doc: use asciidoc attribute for year in copyright of man page
core: fix truncated prefix when filters are toggled (bug #40204)
doc: fix layout of HTML docs when they are printed

Some long lines in docs were causing a zoom, and then the text font was
smaller than it should be. Some styles have been fixed to remove the zoom
and keep the original ratio.
core: add warning about value 0 in help of some history options

Options affected:
- weechat.history.max_buffer_lines_minutes
- weechat.history.max_buffer_lines_number
- weechat.history.max_commands
doc: use asciidoc system attribute {sys:command} for year in copyright of man page
core: fix typo in /help weechat.history.max_buffer_lines_minutes
core: fix typo in /help weechat.history.max_buffer_lines_number
doc: add jabber.py and bitlbee/minbif in list of features (user's guide)
doc: replace "Act:" by "H:" in hotlist (user's guide)
lua: fix crash on calls to callbacks during load of script
doc: fix layout of relay protocol (HTML version) when it is printed
doc: fix typos in color codes (developer's guide)