small Scribble CSS fixes
(cherry picked from commit a24c8361b66cacb6809fc593113722abdbbafa64)
add missing weight of Source Code font
(cherry picked from commit dbad2913ec09975b701b54d373682ad5a94007a8)
racket-style.css: move margin-note img formatting to Guide/Ref icon

Setting image with to 1.5em seems to be aimed specifically at
the cross-reference icons in the Guide and Reference, and the
width should not apply to just any image in a margin note.
(cherry picked from commit 463b81780a6e870d1f201e1b2408424bb02bfe77)
switch to unitless line-heights
(cherry picked from commit bfa5e72816e455a976e3d1458dd9abaa50d60a8e)
adjust CSS selector for blue boxes in documentation
(cherry picked from commit 258aa82282118345b4ca7011c715c53763ce93f1)
racket/gui cocoa: fix atomicity of refresh

Atomicity was accidentally turned off in ca0418d47d.

For whatever reason, this bug seems to cause lots of trouble with
32-bit Mac OS X and not as much for 64-bit Mac OS X.
(cherry picked from commit 13b1d0733a8e686e7b17bf33cfff9f43bcfd5604)
unix: fix `gracket`-based launcher creation

The launcher was always create assuming a specific relative path
from the "bin" drectory to the "lib" directory, but that relative
path changes in a Unix-style install.
(cherry picked from commit b07fa81950d52b7545864a943261a293660c4254)
recognize "1.0.1e" for openssl libraries
(cherry picked from commit 791ec4cfb14a4db24d830da4ba6fa3638da0a5f4)
distro-build: always include version number in directory for source
(cherry picked from commit 387dd2117b950d1c4ce54717b7a82f02b69d3aae)
distro-build: record "" build stamp (especially for release mode)
(cherry picked from commit 8177be0b9953fac926425b4b26e91fdbba8ed083)
Update version number for the v5.93 release