Amplify comment about how quickly RC4 was known to be bad.
Markup for BUGS note about arc4random_uniform.
Cross-reference rnd(4).
Remove unnecessary Ns before punctuation. Fix a line.
Fix Google Groups link.
PR/49399: Henning Petersen: Add man pages for erfl and erfcl
fix sets for new erf{c,}l man pages.
Optimize.