svn path=/main/branches/2.1.7/; revision=14545
is only intended for experimental purposes and should not be enabled under
normal circumstances.
.TP
-.B preserve\-libs
-Preserve libraries when the sonames change during upgrade or downgrade.
-Libraries are preserved only if consumers of those libraries are detected.
-.TP
.B protect\-owned
This is identical to the \fIcollision\-protect\fR feature except that files
may be overwritten if they are not explicitly listed in the contents of a