1.6.10

• link: stop unneeded force linking on Mojave/CLT 10. (@MikeMcQuaid)
• Update manpage with information about alternative compilers (@afnanenayet)
• CLT: correct header package bundle ID (@mistydemeo)
• Remove unused incremental_hash method. (@reitermarkus)
• linkage: fix output of optional dependencies. (@MikeMcQuaid)
• formula_installer: correctly handle build dep reqs. (@MikeMcQuaid)
• download_strategy: use tar xf. (@MikeMcQuaid)
• extend/ENV: support CX11 for LLVM Clang. (@MikeMcQuaid)
• Download refactoring (@reitermarkus)
• travis.yml: update xcode to 9.4 (@commitay)
• bottle_block_cop: remove (@commitay)
• Refactor staging step for download strategies. (@reitermarkus)
• audit: disallow unstable specs for versioned formulae (@commitay)
• Refactor and fix VCS download strategies. (@reitermarkus)
• config: handle HOMEBREW_TEMP being unset. (@MikeMcQuaid)
• vendor: ruby-macho 2.0 (@woodruffw)
• cask audit: check for devmate and hockeyapp appcasts (@commitay)
• Update Gemfile.lock and use Pathname#/. (@reitermarkus)
• Cleanup HOMEBREW_TEMP handling (@MikeMcQuaid)
• audit: exact match throttled formula names (@ilovezfs)
• brew.sh: Don't allow system tmp dirs as prefixes (@woodruffw)
• components_redundancy: audit stable do without a head or devel spec (@commitay)
• audit: exempt versioned formulae from new formula audit (@commitay)
• Show tapped casks. (@reitermarkus)
• Bump github-pages from 186 to 187 in /docs (@Homebrew)
• Re-enable tests by removing a stray rspec :focus (@claui)
• install: don't exit on Homebrew.failed? (@MikeMcQuaid)
• Bump rubocop from 0.57.1 to 0.57.2 in /Library/Homebrew/test (@Homebrew)
• Upgrade to Rubocop 0.57.2 (@apjanke)
• Remove unneeded RuboCop comment. (@reitermarkus)
• DependencyOrder: Fix var initialization bug (@Homebrew)
• Fix Cask#full_name. (@reitermarkus)
• Readd functionality to list all casks. (@reitermarkus)
• linkage: enable cache by default. (@MikeMcQuaid)
• brew.sh: remove unused variable. (@MikeMcQuaid)
• portable-ruby: respect HOMEBREW_BOTTLE_DOMAIN variable. (@MikeMcQuaid)
• Implement HOMEBREW_FORCE_BREWED_GIT (@jacktose)
• Revert "Fix SVN downloads of versioned formula by munging directory names" (@Homebrew)
• mirror: use curl_executable instead of curl function (@ilovezfs)
• mirror: invoke correct curl (@ilovezfs)
• Fix SVN downloads of versioned formula by munging directory names (@apjanke)
• [WIP] formula_installer: Don't check devtools if pouring (@woodruffw)
• cache_store: create HOMEBREW_CACHE when needed. (@MikeMcQuaid)
• cask fetch and upgrade: print caveats (@commitay)
• Update search docs. (@reitermarkus)
• zsh completion: Remove redundant exclusion lists for single options (@apjanke)
• Merge brew cask search into brew search. (@reitermarkus)