Several bug fixes + regression test portability changes.

Changes in v2.3 include:

• support for Modified Condition / Decision Coverage (MC/DC) metrics - see the man pages for details
• remove deprecated lcov --diff ... feature
• various bug fixes and testcase portability fixes

Changes in lcov/2.2 include:

• Support for integrating coverage data/coverage changes during code review.
• Additional --filter options and better counting of number of times filter was applied.
• Improved callback performance
• Additional error checking, especially as related to coverage data consistency.
• Options to enable more compact HTML reports.
• Automated retry if child process dies on out-of-memory during parallel execution.
• Bug fixes

Changes in version 2.1 include:

• Support for other languages/data import from other tools - Perl and Python, in particular, as well as XML import - e.g., from cobertura.
  See perl2lcov --help, py2lcov --help, and xml2lcov --help - as well as the associated tests.

• Improved callback support. See the discussion in the genhtml man page.

• Improved error checking

• lcov regression test suite added to the release - see $LCOV_HOME/share/lcov/tests/README.md for directions on how to execute them in your environment.

• Use lcov to generate coverage reports for lcov - see the directions, above for how to run the lcov regressions and generate a coverage report.

• Performance improvements compared to lcov/2.0 - especially when dealing with very large numbers of files.

• Bug fixes.

Please report any issues you discover so that they can be fixed.

Changes in version 2.0 include:

• Support for differential coverage analysis
• Support for annotation of reports with date and owner information ("binning")
• Support for data filtering to remove artifacts such as exception branches
• Improved HTML navigation and display features
• Improved performance via parallelism
• Improved error checking and error management.

Note that version 2.0 adds new Perl module dependencies. See the README for a list of modules that need to be installed for LCOV to continue working, and hints on how to install them.

Changes in version 1.16 include:

• Option for a dark-mode color scheme
• Option to specify a target coverage rate
• Option to choose the JSON parsing module to achieve better performance
• Options to change HTML headers and footers
• Updated website links
• Multiple bug fixes

Changes in version 1.15 include:

• Support for GCOV's intermediate text and JSON format
• Option to exclude exception branches
• Options to configure symbol demangling
• Multiple bug fixes

Changes in version 1.14 include:

• GCC 8 support
• Options to filter out source files during data collection based
  on regular expressions
• Option to show number of missed lines, functions and branches
• Configuration file option for --demangle-cpp
• Unconditional HTML anchors in source view
• SOURCE_DATA_EPOCH support for reproducible builds
• Multiple bug fixes and performance improvements

Version 1.13 contains bug fixes for a number of issues in various areas of LCOV.

Changes in version 1.12 include:

• Configurable coverage rate precision
• Configurable exclusion markers
• Improved --to-package and --from-package handling
• Improved --demangle-cpp handling
• Multiple prefix directories
• Multiple bug fixes and stability improvements