* Fixed code that prevented writing to BUILDMONITOR.html when $showsummary was set to 0 by moving it into its own separate function
* Also moved out code for cleaning up build files into a separate function
* Made miscellaneous fixes and removed unnecessary code
* Removed redundant code that checked for usr/var directory inside the staging directory since the existence of usr is already checked in previous lines
* Added and fixed double quotes in various places
* Added missing "$" in srcdirpath.SMBuild line
* Removed code that outputs an error in case the extension check fails.
* Added code to warn user when old package build and staging directories not belonging to current packge
exist inside the tmpfs directory
* Fixed sccachepath typos in code that validates sccache binary and hardlinks
* Added code to export RUSTC_WRAPPER variable when sccache is enabled
* Added code to validate app, version, homepage, download and desc variables
* Updated TODO
* Readjusted location of code that outputs current package being built
Readjusted description length in several packages in base section
* "subshelled" the entire script and discarded code to unset variables
* Moved up code that displays application name and version at the start
of the build a few lines up
* Fixed typos
* Converted all upper case variable names to lower case
* Added a TODO section at the top of the script
* Improved code that checks which build variables and functions are not set inside an SMBuild at the beginning of the build
* Moved code that searches for build dependencies near the top of the script and fixed search path to /share/doc
* Added a simple check to determine whether the parent temporary directory is writable
* Commented out code that places $app.{app,version,build} files inside parent temp directory
* Moved code that verifies checksums of source files near the top of the script
* Improved code that exports CONFIG_SITE for autoconf-based packages
* Fixed variable name "tmpfssavingsize"
* Discarded code that introduced passfailcleanup and interruptcleanup functions and reverted back to
prepbuildsummary and interruptsummary functions
Fixed identation in parts of the script
Moved SM_COMMENCEDATE variable at the top of the script
Merged SM_HTMLOUTPUT code above inarray function code into one below that function
Created two new functions - passfailcleanup and interruptcleanup. passfailcleanup deals and moved SM_HTMLOUTPUT code from existing prepbuildsummary and interruptsummary
into those two functions
