fix URxvt URL underline, remove URL launcher
fix available/used memory calculation in kernel 3.14

Linux Kernel 3.14 insert new row to /proc/meminfo:

    MemTotal:        2058480 kB
    MemFree:          955204 kB
    MemAvailable:    1329544 kB
    Buffers:           29808 kB
    Cached:           343592 kB

The third row is the new one which is total - used.

This commit isn't actually a fix, like before, it's not a good code and could run into trouble again.
Update kernel .config linux-3.14.14-gentoo-1
fix /usr/sbin in PATH
add cdmrc of cdm 0.5.3
update to use startx ~/.xinitrc <WM> after updating to gentoo-sources kernel 3.12.13 to 3.14.14 and xorg-server to 1.14.3-r2 3.15.0

The previous cdmrc doesn't work with 0.5.3 and 0.6.1_pre20130419. It might not be the kernel, but when I booted back from 3.12.13, without changing anything, cdm can start X without an issue.

It might not need to use 0.6.1, but after being unable to start X, updating cdm seemed like a logic choice, although it's not the problem source in the end.