Add force-mirror FEATURE.

man/make.conf.5

 .TH "MAKE.CONF" "5" "Mar 2011" "Portage VERSION" "Portage"
 .SH "NAME"
 make.conf \- custom settings for Portage
 .SH "SYNOPSIS"
 \fB/etc/make.conf\fR and \fB/etc/portage/make.conf\fR
 .SH "DESCRIPTION"
 This file contains various variables that are used by Portage.
 Portage will check the currently\-defined environment variables
 first for any settings.  If no environment settings are found,
 Portage then checks the make.conf files. Both /etc/make.conf and
@@ skipping 286 matching lines @@
 Do not delete the ${WORKDIR} directory after the merge process. ${WORKDIR} can
 then be reused since this feature disables most of the clean phase that runs
 prior to each build. Due to lack of proper cleanup, this feature can
 interfere with normal emerge operation and therefore it should not be left
 enabled for more than a short period of time.
 .TP
 .B fixlafiles
 Modifies .la files to not include other .la files and some other
 fixes (order of flags, duplicated entries, ...)
 .TP
+.B force-mirror
+Only fetch files from configured mirrors, ignoring \fBSRC_URI\fR,
+except when \fImirror\fR is in the \fBebuild\fR(5) \fBRESTRICT\fR variable.
+.TP
 .B lmirror
 When \fImirror\fR is enabled in \fBFEATURES\fR, fetch files even
 when \fImirror\fR is also in the \fBebuild\fR(5) \fBRESTRICT\fR variable.
 Do \fBNOT\fR use \fIlmirror\fR for clients that need to override \fBRESTRICT\fR
 when fetching from a local mirror, but instead use a "local" mirror setting
 in \fI/etc/portage/mirrors\fR, as described in \fBportage\fR(5).
 .TP
 .B metadata\-transfer
 Automatically perform a metadata transfer when `emerge \-\-sync` is run.
 In versions of portage >=2.1.5, this feature is disabled by
@@ skipping 556 matching lines @@
 Contains a list of all local USE variables.
 .SH "SEE ALSO"
 .BR emerge (1),
 .BR portage (5),
 .BR ebuild (1),
 .BR ebuild (5)
 .TP
 The \fI/usr/sbin/ebuild.sh\fR script. 
 .TP
 The helper apps in \fI/usr/lib/portage/bin\fR.