Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r294961 through r295350.

MfH @r295202

Expect to see panics in routing code at least now.

f_substr(): Optimized recipe if running under bash

This makes runnig f_substr() faster than it was when running under bash,
but both sh and dash are still faster when using the non-bash recipe which

f_substr(): Optimized recipe if running under bash

This makes runnig f_substr() faster than it was when running under bash,
but both sh and dash are still faster when using the non-bash recipe which
features dynamically unrolled loops.

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f_substr: Write to stdout when no `-v var_to_set'

Fixes ``setvar: : bad variable name''

Remove trailing whitespace

MFH

Sponsored by: The FreeBSD Foundation

Define f_sprintf() dynamically at inclusion time

No need to check/re-check capabilities that won't change at runtime.

MFH

Sponsored by: The FreeBSD Foundation

Move awk(1)-dependent recipes to the bottom

Move f_isinteger() to the top

Grouping builtins-only algos together

Move f_vsprintf() below f_sprintf()

Variable argument versions grouped with standard versions

Move f_sprintf() above f_snprintf()

Ordering functions by appearance of use

Optimize f_substr() to use built-ins only

Change f_snprintf() to use optimzed f_substr()

Optimize f_sprintf() for bash

bash lacks the ksh93 optimization that makes sub-shells fast if they do
not alter io. bash 3.1-alpha1 introduced printf -v var_to_set which is not
as fast but is still

Optimize f_sprintf() for bash

bash lacks the ksh93 optimization that makes sub-shells fast if they do
not alter io. bash 3.1-alpha1 introduced printf -v var_to_set which is not
as fast but is still significantly faster than var_to_set=$( printf ) when
using any version of bash. If we find our interpreter to somehow be bash
by invocation or inclusion, use the feature that provides fastest results.

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Merge ^/head r294777 through r294960.

MFH

Sponsored by: The FreeBSD Foundation

Replace awk with more efficient builtins-only algo

Merge ^/head r294599 through r294776.

MFH

Sponsored by: The FreeBSD Foundation

Fix a typo in a comment

MFC after: 3 days
X-MFC-to: stable/10

MFC @ r266724

An SVM update will follow this.

Merge head

IFC @264767