Bug 3038: Detatch libmisc from libcompat

Bug 3038: Detatch libmisc from libcompat

* Migrates many of the remaining libmisc portability wrappers into
  libcompat.

* Splits libmisc into:
   libprofiler - Squid internal profiler (developer-only)
   libmiscencoding - Various binary encoding / crypto algorithms
   libmisccontainers - Various data container algorithms

* Makes all binaries which need to link the libmisc* pieces directly instead
  of via $(COMPAT_LIB) which now only links the libcompat and internal
  profiler due to profiling being used on some libcompat functions.

* Adds a stub_debug for binaries needing the Debug.h API without squid
  timers and globals.

Some effort has been made to identify binaries whose dependencies can be
reduced. More of this dependency removal can be done in future.