Add support for client-side URL transfer library

Packages describing “curl” as local USE flag

Package“curl” Flag Description
app-admin/rsyslogEnable http_request() function in RainerScript (requires net-misc/curl)
app-emulation/qemuSupport ISOs / -cdrom directives via HTTP or HTTPS.
app-forensics/aideUse curl for http,https and ftp backends
app-mobilephone/gammuEnables curl support
dev-libs/sentry-nativeEnable support for automated uploading of crash reports
dev-php/PEAR-HTTP_Request2Force dev-lang/php to be compiled with curl extension
dev-vcs/darcsUse libcurl for HTTP support.
dev-vcs/gitSupport fetching and pushing (requires webdav too) over http:// and https:// protocols
media-gfx/asymptoteEnables running remote programs via net-misc/curl
media-sound/mpdSupport for web stream listening
net-analyzer/nagios-plugins-linux-madrisanBuild check_container which requires net-misc/curl
net-analyzer/traceboxBuild the curl component for uploading capture files using net-misc/curl
net-libs/liboauthIf enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations.
net-misc/gerberaSupport HTTP media sources (e.g. internet radio)
sys-apps/systemdEnable support for uploading journals
sys-block/fioEnable HTTP engine for S3 and WebDav support support via net-misc/curl

All packages providing a “curl” USE flag (61)