Merge branch 'hotfix/1.20.10'
use proper sed flags for osx, fix #1910
add extra warning when installing EPEL fails, do not install EPEL if libyaml is not needed, fix #1909
try to make fink installation work
add missing cd in fink installation
fix fink default paths and do not hide fink installation
fink requires sudo - install to /sw
add a warning for fink installation, make sure /sw is used for installation
improve fink support, closes #1911
fix detecting installed packages in fink and updating certificates
updating fink
revisited list of required packages on fink
automatic installation with fink
osx_fink: autoconf2.6 is required for automake1.13
osx_fink: disable ruby-1.8, fix openssl, fix libtool
move osx_fink auto-detection to the end
save fink lib search link for later
wrap fink update with log file
fix: wrap fink update with log file
fix "Error: No such keg" errors